Our Team

Our seasoned staff include landscape architects, designers, graphic designers, planners and environmental specialists. This dedicated team utilizes a multi-disciplinary approach to problem solving and has produced award-winning results.

Whether forging through a wetland conducting environmental assessments, analyzing and building GIS (Geographic Information Systems) maps, designing and building landscape projects or planning the next residential or commercial destination, you can count on Cotleur & Hearing to accomplish the task.

Our Founders

Robert Cotleur and Donaldson Hearing have been practicing Landscape Architecture in South Florida for over 27 years. Both graduated with honors at the top of their respective classes and have won scholastic and professional awards in their field. In May 1991, they started the firm of Cotleur & Hearing Inc., focusing their expertise and energy on landscape architecture, land planning and the rapidly growing field of environmental design.

Robert J. Cotleur, PLA, ASLA

Rob Cotleur is owner and Vice President of Cotleur & Hearing Landscape Architects, Land Planners and Environmental Consultants. Rob has practiced landscape architecture in Palm Beach County for over thirty years. He has developed considerable knowledge of the South Florida ecology while participating in numerous planning, design, environmental ...

Rob Cotleur is owner and Vice President of Cotleur & Hearing Landscape Architects, Land Planners and Environmental Consultants. Rob has practiced landscape architecture in Palm Beach County for over thirty years. He has developed considerable knowledge of the South Florida ecology while participating in numerous planning, design, environmental and construction administration projects. Over the past decade, Mr. Cotleur has come to specialize in transportation projects to the point where they now account for over ninety percent of his work.

Rob’s professional affiliations are with the American Society of Landscape Architects, Sigma Lambda Alpha, National Honor Society, State of Florida Registered Landscape Architect, and Jupiter Beach Enhancement Committee member.

Rob is a state of Florida registered landscape architect and Cum Laude Honor Graduate from Ohio State University with a Bachelor of Landscape Architecture degree. Mr. Cotleur and his wife, Alex, reside in Jupiter, Florida along with their daughter and son.

Donaldson E. Hearing, PLA, ASLA, LEED

Don Hearing is owner and President of Cotleur & Hearing Landscape Architecture with over thirty years of experience in this discipline. He has been practicing in South Florida since 1982. Don was raised in South Florida and is a state of Florida registered landscape architect. He is a honor graduate from the University of Florida […]...

Don Hearing is owner and President of Cotleur & Hearing Landscape Architecture with over thirty years of experience in this discipline. He has been practicing in South Florida since 1982. Don was raised in South Florida and is a state of Florida registered landscape architect. He is a honor graduate from the University of Florida with a Bachelor of Landscape Architecture degree and is a certified LEED Accredited Professional. Don also serves as managing partner of Cotleur & Hearing Investments, a real estate development and acquisition company.

Don serves on the Board of Directors and Executive Committee for the Palm Beach North Chamber of Commerce and the Business Development Board of Palm Beach County. He was the Chairman of the Chamber of Commerce in 2015. Don is a Director for the PGA Corridor Association and The Lighthouse Center for the Arts as well as a board member for MyClinic of Jupiter and a board member for Jupiter Christian School.

In conjunction with his business interests, Don is actively involved in numerous charitable organizations which include Christ Fellowship Church, Jupiter Christian School, The Place of Hope and the West Jupiter Tutorial Center to name a few.

In 2011, the American Institute of Architects recognized Don as Landscape Architect of the Year for Palm Beach County. In 2012, he was the recipient of the Community Leader of the Year Award presented by the Northern Palm Beach County Chamber of Commerce.

Don and his wife, Suzanne, reside in Jupiter. They have three daughters.

Our Team

Alex Ahrenholz
Land Use Planner

Alex Ahrenholz joined Cotleur & Hearing in February of 2017, immediately after graduating from the University of Florida with his Master’s degree in Urban and Regional Planning. He has been working mostly on projects throughout unincorporated Palm Beach County and is quickly gaining experience in project coordination through the various resid...

Alex Ahrenholz joined Cotleur & Hearing in February of 2017, immediately after graduating from the University of Florida with his Master’s degree in Urban and Regional Planning. He has been working mostly on projects throughout unincorporated Palm Beach County and is quickly gaining experience in project coordination through the various residential, civic and commercial sites being developed.

Leslie Arcari
Accounts Receivable Billing Processor

Leslie Arcari has been with Cotleur & Hearing since 2005. Her administrative responsibilities consist of setting up new project files and client information to ensure accurate processing of monthly invoices. She also assists in archiving projects and follows up with project managers regarding contracts and open receivables, contacting clients r...

Leslie Arcari has been with Cotleur & Hearing since 2005. Her administrative responsibilities consist of setting up new project files and client information to ensure accurate processing of monthly invoices. She also assists in archiving projects and follows up with project managers regarding contracts and open receivables, contacting clients regarding status of work completed to date and remaining contract amounts by preparing project progress reports and spreadsheets depicting status of contracts.

Marilyn Black
Secretary

Marilyn Black provides secretarial/clerical support for the two principals of Cotleur & Hearing, planners and staff within time frames to help meet deadlines. Marilyn joined the Cotleur & Hearing team in 2003 and her secretarial experience has included diverse and interesting types of businesses including hospital and medical centers, hospi...

Marilyn Black provides secretarial/clerical support for the two principals of Cotleur & Hearing, planners and staff within time frames to help meet deadlines. Marilyn joined the Cotleur & Hearing team in 2003 and her secretarial experience has included diverse and interesting types of businesses including hospital and medical centers, hospitality industry, law firms specializing in real estate and securities, architecture and landscape architecture. Computer experience includes Windows XP and Word, scanning, graphics, digital camera, Excel, Lotus Notes, Outlook, QuickBooks, Deltek, Print Audit, Desktop Publishing, Adobe Acrobat Professional and internet research.

Sandra Bruorton
Financial Manager

Sandra Bruorton has directed the financial, Human Resources and office management divisions of Cotleur & Hearing for 20 years. Her dedication continues, with the valued support of her team, to keep a strong control of the company’s finances and management of the company’s properties. She is also a member of the National Notary Association....

Sandra Bruorton has directed the financial, Human Resources and office management divisions of Cotleur & Hearing for 20 years. Her dedication continues, with the valued support of her team, to keep a strong control of the company’s finances and management of the company’s properties. She is also a member of the National Notary Association.

Geoff Campbell, PLA
Landscape Architect

Geoff Campbell joined the Cotleur & Hearing team in February of 2014. He brings with him a strong technical background and a passion for environmentally sustainable design. After serving for over a year as the in-house Landscape Architecture Consultant at FDOT District IV, Geoff’s primary role is within the transportation division, developing...

Geoff Campbell joined the Cotleur & Hearing team in February of 2014. He brings with him a strong technical background and a passion for environmentally sustainable design. After serving for over a year as the in-house Landscape Architecture Consultant at FDOT District IV, Geoff’s primary role is within the transportation division, developing innovative design solutions for South Florida’s State Roadway System. With a multi-disciplinary background, he brings a unique perspective to our team and is able to communicate with various other design professionals from a position of experience. He received his Bachelor’s Degree in Landscape Architecture from the University of Georgia and is a registered landscape architecture and holds a LEED Accreditation for Building Design and Construction.

Sarah Dark
Graphic Designer

Sarah Dark joined Cotleur & Hearing early in her design career in 2012.  With a Bachelor’s Degree in Landscape Architecture from The University of Florida and a certificate of graphic design,  she has the content knowledge and design skills that allow her to contribute a high-quality design product. At Cotleur & Hearing, Sarah collabo...

Sarah Dark joined Cotleur & Hearing early in her design career in 2012.  With a Bachelor’s Degree in Landscape Architecture from The University of Florida and a certificate of graphic design,  she has the content knowledge and design skills that allow her to contribute a high-quality design product. At Cotleur & Hearing, Sarah collaborates with landscape architects and planners to develop architectural elevations, site plan renderings as well as company marketing and advertising materials. In 2013, she relocated to North Florida where she works remotely from her home office in Atlantic Beach and maintains her role as lead graphic designer.

Sarah currently serves on the City of Atlantic Beach’s Beautification & Natural Resource Preservation Advisory Committee and is the lead graphic designer for Future Landscape Architects of America (FLAA) since its founding in 2015.

Kate DeWitt, AICP
Land Use Planner

Kate DeWitt has worked as a land use planner for Cotleur & Hearing since 2013. Prior to joining the Cotleur & Hearing team, Kate worked as a land use planner for a local municipality. She has worked on numerous planned unit developments, commercial, residential, and mixed-use projects in a variety of municipalities. Kate provides expertise ...

Kate DeWitt has worked as a land use planner for Cotleur & Hearing since 2013. Prior to joining the Cotleur & Hearing team, Kate worked as a land use planner for a local municipality. She has worked on numerous planned unit developments, commercial, residential, and mixed-use projects in a variety of municipalities. Kate provides expertise in areas such as due diligence studies, future land-use amendments, zoning applications, variances, permit coordination, as well as masterplan and site plan approvals associated with new development projects.

Jessica Dunstan
Project Manager

Jessica Dunstan has worked as a project manager for Cotleur & Hearing since 2000.  She brings a special viewpoint and expertise to CH as she is originally from the Jupiter area.  Jessica primarily focuses her efforts on working with developers and engineers to create conceptual site plans for large-scale residential projects throughout Palm B...

Jessica Dunstan has worked as a project manager for Cotleur & Hearing since 2000.  She brings a special viewpoint and expertise to CH as she is originally from the Jupiter area.  Jessica primarily focuses her efforts on working with developers and engineers to create conceptual site plans for large-scale residential projects throughout Palm Beach County and St. Lucie County.  Additional project experience includes commercial site planning and design along with construction administration.  Some of her notable projects are Divosta’s Mallory Creek and Windsor Park within Abacoa.  Jessica studied chemistry at Florida State University and has a background in environmental studies.  

Jennifer Eaton
AutoCAD Technician

Jennifer Eaton attended Palm Beach State College and started her drafting career while still in high school. She has over 20 years of valued experience as an expert AutoCAD technician and gained her knowledge from her extensive work in several disciplines of the construction and development industry. Jennifer is enthusiastic about landscape archite...

Jennifer Eaton attended Palm Beach State College and started her drafting career while still in high school. She has over 20 years of valued experience as an expert AutoCAD technician and gained her knowledge from her extensive work in several disciplines of the construction and development industry. Jennifer is enthusiastic about landscape architecture and happily prepares site, landscape and irrigation plans for our landscape architects and planners for final approval and permitting. Her passion for precision, graphics and “clean drawings” brings an extra flair to her work. She makes CH plans beautiful and fills in the gaps for our high-performing team.

Leah Heinzelmann, ASLA
Landscape Designer

Leah Heinzelmann traveled over 1,500 miles to begin her career as a landscape designer at Cotleur & Hearing in June of 2016. She is a Wisconsin native who attended the University of Wisconsin Madison and graduated with a double major in landscape architecture and music performance. Leah works under the supervision of project manager, Daniel [&h...

Leah Heinzelmann traveled over 1,500 miles to begin her career as a landscape designer at Cotleur & Hearing in June of 2016. She is a Wisconsin native who attended the University of Wisconsin Madison and graduated with a double major in landscape architecture and music performance. Leah works under the supervision of project manager, Daniel Sorrow, and helps design site plans, landscape plans, and renderings in Port St. Lucie and Martin County. Leah is a team player and has become especially skilled in large-scale master planning, site planning, and graphic design in her time at Cotleur & Hearing.

Amanda Huang
Landscape Designer

Amanda Huang holds a bachelor’s degree of Landscape Architecture from the Oklahoma State University. She is analytical, detail- oriented and has strong sketching and graphic skills for conceptualizing innovative idea generation in site planning and detail design. She has experience in a variety of projects including design amenities, streetsc...

Amanda Huang holds a bachelor’s degree of Landscape Architecture from the Oklahoma State University. She is analytical, detail- oriented and has strong sketching and graphic skills for conceptualizing innovative idea generation in site planning and detail design. She has experience in a variety of projects including design amenities, streetscapes, clubhouses, hotels and golf resort community developments.   As a landscape designer at Cotleur & Hearing, Amanda has been involved with a variety of projects ranging from small to large scale master plans, detailed site design and landscape design for residential, commercial and recreational park projects in Palm Beach County.

Jeremy Hubsch, AICP
Senior Land Use Planner

Jeremy Hubsch joined Cotleur & Hearing in 2017 as a Senior Land Use Planner. Prior to joining Cotleur & Hearing, he spent eight years in the Jacksonville area in public and private sector planning roles, including three years as Planning Director of Atlantic Beach. Jeremy has worked on an array of project types including mixed-use […...

Jeremy Hubsch joined Cotleur & Hearing in 2017 as a Senior Land Use Planner. Prior to joining Cotleur & Hearing, he spent eight years in the Jacksonville area in public and private sector planning roles, including three years as Planning Director of Atlantic Beach. Jeremy has worked on an array of project types including mixed-use infill, large-scale planned unit developments, zoning entitlements, annexations, CRA’s, future land use amendments, and commercial corridor redevelopment. Jeremy holds a master’s degree in Urban Planning from Florida State University.

Heather Kinkead, PLA
Landscape Architect

Heather Kinked  has worked as a landscape architect/designer for thirteen years. She moved to Florida and became employed with Cotleur & Hearing in February of 2005. Since her employment at Cotleur & Hearing, she has had the opportunity to work on numerous commercial, residential and transportation landscape projects, becoming especially s...

Heather Kinked  has worked as a landscape architect/designer for thirteen years. She moved to Florida and became employed with Cotleur & Hearing in February of 2005. Since her employment at Cotleur & Hearing, she has had the opportunity to work on numerous commercial, residential and transportation landscape projects, becoming especially skilled in the development transportation landscape plans and permits for Palm Beach County and the Florida Department of Transportation. She has also become skilled in plan review for FDOT projects, construction administration and site inspections as many of her projects come to successful fruition.

Melissa Kostelia
Land Use Planner

Melissa Kostelia has ten years of planning and landscape design experience with a specialty in ArcGIS. Her focus is on medium-scale, residential and commercial developments in Palm Beach County. Melissa carried out government liaison work for clients seeking approvals for land use amendments, concurrency, rezoning, text amendments, variances, subdi...

Melissa Kostelia has ten years of planning and landscape design experience with a specialty in ArcGIS. Her focus is on medium-scale, residential and commercial developments in Palm Beach County. Melissa carried out government liaison work for clients seeking approvals for land use amendments, concurrency, rezoning, text amendments, variances, subdivision, conditional use, as well as master plan and site plan approvals associated with new development and redevelopment projects. She has conducted due diligence analyses assessing the value potential of lands considered for development. She also has experience using the ArcGIS software to create and organize databases and create maps.

Kristy Lee
Business Manager

Kristy Lee joined the Cotleur & Hearing team in 2016. She received her Bachelor of Science in Business Management from the University of South Florida. Kristy is responsible for assisting and handling a variety of administrative duties in the office. Her organizational and customer-oriented mindset allow her to provide our team with assistance ...

Kristy Lee joined the Cotleur & Hearing team in 2016. She received her Bachelor of Science in Business Management from the University of South Florida. Kristy is responsible for assisting and handling a variety of administrative duties in the office. Her organizational and customer-oriented mindset allow her to provide our team with assistance no matter the task. Kristy goes above and beyond to ensure that even the office’s day-to-day details run smoothly and efficiently and that our staff and clients are happy.

Yskins Lormejuste
Project Manager

Yskins Lormejuste is the manager for Cotleur & Hearing Landscape Company. Yskins has over 20 years experience and oversees 20 employees. He is responsible for implementing intricate landscape and hardscape design. Yskins has worked on a diverse range of projects including luxury resorts, single family estates and large communities. Some of the ...

Yskins Lormejuste is the manager for Cotleur & Hearing Landscape Company. Yskins has over 20 years experience and oversees 20 employees. He is responsible for implementing intricate landscape and hardscape design. Yskins has worked on a diverse range of projects including luxury resorts, single family estates and large communities. Some of the projects Yskins has overseen include the Alton Clubhouse in Jupiter, The Towers at Biscayne Bay in Coral Gables, Berumudiana Shopping Center in Jupiter as well as luxury estate properties in Palm Beach Polo Club in Wellington, Jupiter Island, Admiral’s Cove in Jupiter and Palm Beach. Yskins is an expert in the identification of exotic landscape material for speciality clients.

Brittany Mullen
Property Operations Manager & Accounting

Brittany Mullen joined the Cotleur & Hearing team in 2007. She assists in managing various types of business accounts for Cotleur & Hearing, as well as: Maplewood Professional Center Condominium Association, Bermudiana Condominium Association, Bermudiana, L.L.C., Coco Vista, L.L.C, Cotleur & Hearing Investments, Cotleur & Hearing, L...

Brittany Mullen joined the Cotleur & Hearing team in 2007. She assists in managing various types of business accounts for Cotleur & Hearing, as well as: Maplewood Professional Center Condominium Association, Bermudiana Condominium Association, Bermudiana, L.L.C., Coco Vista, L.L.C, Cotleur & Hearing Investments, Cotleur & Hearing, L.L.C, CH2 Admirals, LLC, Maplewood Investors, LLC, C&H Acquisitions, CH SPEC PSL, LLC and CH 299 PSL, LLC. She works directly with Don Hearing on monthly invoicing for Cotleur & Hearing projects. Her computer skills are in the following programs: QuickBooks, Deltek Vision, Microsoft Word, Excel, Adobe, Print Audit. Mrs. Mullen’s other duties include electronic filing, scheduling meetings, typing dictations, answering phones, accounts payable, accounts receivable and compiling annual budgets for all listed companies above. Brittany is an active member of the American Orchid Society and a Florida Notary.

Rebecca Ortiz
AutoCAD Technician

Rebecca Ortiz has worked in the urban landscaping field for over twelve years with eleven of those years at Cotleur & Hearing. She is involved from the initial design development process and has interest in the design aspect of landscape architecture and site layout. She works directly with principal landscape architects and planners through th...

Rebecca Ortiz has worked in the urban landscaping field for over twelve years with eleven of those years at Cotleur & Hearing. She is involved from the initial design development process and has interest in the design aspect of landscape architecture and site layout. She works directly with principal landscape architects and planners through the site development concept process and drafts site and landscape plans for the company. Rebecca likes to envision the overall big picture and is proficient with AutoCAD. Some of her most notable projects include The Quaye Palm Beach Gardens and Wellington, The Center for Intelligent Buildings at Alton and The Barcelona Apartments in Jupiter.

Nicole Plunkett, PLA, ASLA
Landscape Architect

While attending the University of Florida, Nicole interned with Cotleur & Hearing during the summer of 2008 and 2009, where she gained valuable experience within residential design. After graduating from the University of Florida in 2010, Nicole was hired at Cotleur & Hearing as a full time landscape architect. She has experience working wi...

While attending the University of Florida, Nicole interned with Cotleur & Hearing during the summer of 2008 and 2009, where she gained valuable experience within residential design. After graduating from the University of Florida in 2010, Nicole was hired at Cotleur & Hearing as a full time landscape architect. She has experience working with multiple site and landscape plan submittals throughout Palm Beach County,representing projects throughout the public hearing process to gain approvals and code compliance.She has also been responsible for creating mapping and informational graphics within GIS for due diligence reports and environmental studies for a number of projects within South Florida. She works on a broad variety of projects throughout Palm Beach County and leads project teams from the very beginning of a project through final construction.

In 2017, Nicole was selected to participate in the 2017-2018 inaugural Landscape Architecture Foundation (LAF) Fellowship for Innovation + Leadership and awarded $25,000. During her Fellowship, she worked on the replication and scalability of Future Landscape Architects of America (FLAA), a non-profit organization founded by Nicole which focuses on educating K-12 students about the career field of landscape architecture. She was also honored with the 2017 Exceptional Emerging Professional Award by the American Society of Landscape Architects Florida Chapter (ASLA FL).

Erin Porter, PLA
Director of Design Landscape Architect

Erin Porter is a senior level landscape architect with Cotleur & Hearing. Erin works on a variety of projects including high-end, residential design with a focus on pool, hardscape and landscape design. She is also involved with site and landscape planning for medium-size, residential communities and commercial projects. Ms. Porter works in coo...

Erin Porter is a senior level landscape architect with Cotleur & Hearing. Erin works on a variety of projects including high-end, residential design with a focus on pool, hardscape and landscape design. She is also involved with site and landscape planning for medium-size, residential communities and commercial projects. Ms. Porter works in cooperation with the staff planner and principal landscape architect to ensure a positive outcome on every project.   In addition to excellence in design, Erin places an emphasis on graphic ability, readability and rendering.

Michelle Regan, PLA, ASLA
Landscape Architect

Michelle Regan joined Cotleur and Hearing in September of 2013 after receiving her Bachelor’s Degree in Landscape Architecture from the University of Florida. Since she became a part of the team, Michelle has contributed to several large-scale development projects and has been involved with mixed-use, commercial, residential, and redevelopmen...

Michelle Regan joined Cotleur and Hearing in September of 2013 after receiving her Bachelor’s Degree in Landscape Architecture from the University of Florida. Since she became a part of the team, Michelle has contributed to several large-scale development projects and has been involved with mixed-use, commercial, residential, and redevelopment projects. She works in conjunction with a principal and staff planner on numerous projects, mostly in Palm Beach County. Michelle is a team leader and has become especially skilled in large-scale master planning, conceptual design, site planning, and has a keen eye for streetscape design.

Darlene Schaukowitch
Executive Assistant

Darlene is in charge of collections and dedicates her efforts focusing on receivables.  With her extensive background as an executive assistant and many years of dedicated service to Cotleur & Hearing, she is able to offer her knowledge of the business, confidentiality, organizational skills, feedback and training in various situations as requ...

Darlene is in charge of collections and dedicates her efforts focusing on receivables.  With her extensive background as an executive assistant and many years of dedicated service to Cotleur & Hearing, she is able to offer her knowledge of the business, confidentiality, organizational skills, feedback and training in various situations as required.  Additionally, her business acumen allows her to be flexible, decisive and take whatever action is needed.

Dan Sorrow, AICP, PLA, LEED AP BD+C
Project Manager

Dan Sorrow joined Cotleur & Hearing in 2012 and manages both private and public sector projects. Mr. Sorrow is a registered landscape architect, AICP land planner, LEED AP BD+C professional and certified arborist. He provides consulting services in the areas of zoning entitlement, site planning, master planning, landscape architecture, irrigati...

Dan Sorrow joined Cotleur & Hearing in 2012 and manages both private and public sector projects. Mr. Sorrow is a registered landscape architect, AICP land planner, LEED AP BD+C professional and certified arborist. He provides consulting services in the areas of zoning entitlement, site planning, master planning, landscape architecture, irrigation design, permitting and construction management. He takes a holistic approach to design and management and provides all-encompassing solutions to project challenges. Dan strives to serve every client and their projects’ needs with the utmost importance.

George Missimer
Land Use Planner

George Missimer graduated from Florida State University in 2017 with a bachelor’s degree in environment and society and a minor in biology. After graduation, George began working with Cotleur & Hearing as a planning technical under one of Cotleur & Hearing project managers. George assists on a variety of residential and commercial pro...

George Missimer graduated from Florida State University in 2017 with a bachelor’s degree in environment and society and a minor in biology. After graduation, George began working with Cotleur & Hearing as a planning technical under one of Cotleur & Hearing project managers. George assists on a variety of residential and commercial projects in Indian River County, St. Lucie County, Martin County and Palm Beach County. George grew up in Martin County and has strong ties to the community and has a desire to help influence the way South Florida develops in the future.

Aaron Wilbur, PLA
Landscape Architect

Aaron Wilbur began his career working at Cottage Gardens, Inc. in 2009, a residential design build firm located in Gainesville, Florida. At Cottage Gardens, Aaron functioned as the lead designer and project manager. In March 2013, Aaron joined the Cotleur & Hearing team. Aaron brings an eagerness to learn and the ability to adapt quickly [&hell...

Aaron Wilbur began his career working at Cottage Gardens, Inc. in 2009, a residential design build firm located in Gainesville, Florida. At Cottage Gardens, Aaron functioned as the lead designer and project manager. In March 2013, Aaron joined the Cotleur & Hearing team. Aaron brings an eagerness to learn and the ability to adapt quickly to new types of projects and computer programs. To date, he has worked on several county and city submittals, two large neighborhood development projects and has completed numerous FDOT and county roadway projects. Aaron is currently working on several FDOT projects as a member of the firm’s transportation division. He has quickly become an expert in the FDOT’s electronic delivery process and provides construction inspection services, including locating and approving of plant materials.