& Expertise
from the
Ground Up

Founded in 1999 with three employees, Mahoney Associates is now one of the Hamptons' leading full-service landscape firms, with a team of over forty landscape and management professionals, including designers, horticulturists, arborists, and turfgrass managers. We take a proactive approach to every aspect of residential and commercial landscaping and are dedicated to creating and maintaining the most beautiful outdoor spaces on the East End.

Trimming the hedges

The Firm

Located in the heart of Southampton, Mahoney Associates' 8000-square foot, state-of-the-art facility houses over 300 pieces of highly efficient, professional grade equipment. Our investment in innovative technology, the highest quality materials and equipment, and the safety and professional development of our team, sets Mahoney Associates apart as the industry leader in professionalism, expertise, innovation and service.  Our standard of excellence is evident in every aspect of our operation. Mahoney Associates is the proud recipient of the NALP Safety Award, year after year.

Shovel breaking ground

Our Approach

Quality & Care are in Our Roots

Mahoney Associates has deep roots on the East End and we are committed to honoring its rich history and preserving the natural beauty of our environment.  This commitment is instilled in our team and fostered through education and professional development, and it is evident in our comprehensive approach to landscape design and service. We value our clients, our team, our community and our environment and we take a holistic approach to serving the bests interests of all. 

  1. We respect the individual, whether a client, an employee or a community member.
  2. We provide outstanding customer service. Our goal is to exceed expectations in all aspects of our business.
  3. We participate in our community, working with town and village boards and advisory committees, to maintain and strengthen harmony between our industry and our community and to ensure best practices for our environment. 

Our Green Commitment

Green isn’t Just the Color of Our Lawns

Our team is committed to fostering and maintaining a healthy and thriving environment. We're conscious of the environmental impact of every product and piece of equipment we use.  This is evident in our fleet of electric cars, our organic programs for plant health care, lawn and specialty applications, and our landscape designs for revegetation, sensitive eco-systems, and pollinator gardens.  At Mahoney Associates, we produce and custom blend all of our compost and soils in-house to promote proper soil micro-biology.  The environment is our business and our clients benefit from beautiful and environmentally harmonious landscapes.

Watering a garden

Our Team

Mahoney Associates is known for its skilled and cohesive team. Longevity is part of the reason we’re able to bring such efficiency to each project. Our experienced people have an unparalleled work ethic. Each designer, horticulturalist, architect, and landscape professional is completely committed to quality. Hands-on Management that invests in ongoing education and best technology and equipment give them the tools they need and the confidence to do their best. Led by Don Mahoney, and guided by his integrity and passion, our team continues to grow.

Don Mahoney Jr, founder of landscaping company Mahoney Associates

Don Mahoney Jr signature

Donald E. Mahoney, Jr.

Founder of both Mahoney Associates and East End Snow & Ice Management, Don’s professional expertise and customer-driven focus have helped build these sister companies into the South Fork’s premier year-round exterior maintenance provider.

Before founding Mahoney Associates in 1999, Don spent a decade working in high-end residential landscape installations and sales on Long Island while completing his education. A professional landscape contractor with an educational background in both landscape development and organizational management, Don is a New York State Certified Nursery and Landscape Professional, a New York State Certified Commercial Pesticide Applicator a Certified Snow Professional and Advanced Snow Manager with the National Snow & Ice Management Association. His unique blend of hands-on skill and entrepreneurial expertise are instrumental as he leads the growing businesses.

Don is a member of multiple professional organizations, including the Professional Landcare Network, Nassau Suffolk Landscape Gardeners Association, The New York State Landscape and Grounds Association, Professional Certified Applicators of LI and the Snow & Ice Management Association.  Don is also an active member of several local business associations, including, The Southampton Chamber of Commerce and Business Alliance of Southampton. A lifelong resident of the East End community, Don serves as a volunteer and treasurer of the Southampton Village Volunteer Ambulance Corp.  He is also a founding business sponsor of the Southampton Youth Services.

Don earned an associate degree in landscape development from the State University of New York at Cobleskill and a certificate in turfgrass management from Cornell University.  He also studied organizational management at St. Josephs College.

Suzanne R. Wilutis
Chief Financial Officer & Business Manager

Joining Mahoney Associates, Inc. in 2021, Suzanne is a proven growth-oriented leader with over 25 years of business management and managerial accounting experience.  Strategic financial and data analytics, accounting oversight, organizational structure and operations management are Suzanne’s key areas of focus at Mahoney Associates. 

Suzanne is a graduate of Loyola University, Maryland, where she earned a Bachelor Degree in Business Administration, Accounting.  Suzanne began her career in public accounting with Arthur Andersen, LLP and Morgan Stanley, before moving to the East End and focusing her career in private sector business management, managerial accounting and consulting. Suzanne’s industry experience includes health care, manufacturing and real estate development.

Jessica Geoghegan
Accounting Manager

Jessica joined Mahoney Associates in 2018 and currently leads our accounting department. During her tenure, she has held positions as administrative assistant, contract administrator and bookkeeper, while also taking the lead in the facilitation of the conversion and implementation of our industry specific ERP software. She is presently responsible for all aspects of billing and accounts payable and assists with managerial accounting, job costing, budgeting and financial reporting.  Jessica is a graduate of John Jay College in Manhattan.

Jay Poremba
Fleet Director & Snow Operations Manager

Jay has been an integral part of the Mahoney Associates team since 2011. Jay’s knowledge and expertise in mechanics runs deep and attention to detail is in his blood. He worked as a high-end machinist, building race car engines prior to joining Mahoney Associates.  His proactive approach to managing the landscape and snow fleet with a focus on preventative maintenance has worked to keep break downs and other equipment malfunctions to a minimum.  Jay’s motto is “give the crews the best and highest performing equipment so they don’t have to struggle in the field”.  Jay is also an excellent leader in the field based on his many years of experience in site work and excavation, from capping environmentally regulated landfills to sitework and drainage projects. Jay has an innate ability to assess a site and determine the necessary processes and requirements and a proven track record of success.

Jay was the recipient of the Snow Operations Manager of the Year awarded from SIMA in 2019

Nicholas Geoghegan
Director of Operations

Nicholas joined Mahoney Associates, Inc. in August of 2019 and brings with him 15 years of experience in business management and development. He has exceptional communication and interpersonal skills with an in depth understanding of project objectives and the importance of maintaining budgetary and timeline goals.

Nicholas is a graduate of Stony Brook University with a B.A. in History. In combination with his education, he uses his extensive work experience to communicate successfully with his fellow management team, other employees, vendors and clients. With his in-depth thinking and strategic planning skills he effectively manages resource allocation, scheduling and assists in production efficiency.

Michael Maskiell
Production Manager

A graduate of SUNY Cobleskill with a degree in Applied Science and Turf Management, Michael has over 25 years of field experience.  A key member of the Mahoney Associates management team since 2008, Michael manages all areas of landscape production.  He holds a Certified Pesticide Applicator License, is an Alumni of LDP, and is certified by Suffolk County Executive Office of Consumer Affairs for for organic applications.

Michael is a member of the American Society of Landscape Architects, Nassau Suffolk Landscape Gardeners Association and the New York State Turfgrass Association. He takes pride in the long-standing relationships he has with each client and their landscape.

Bennett Swezey
Production Supervisor

Bennett joined Mahoney Associates, Inc. in 2019 and quickly advanced his career from field crew applicator to Production Supervisor. Bennett manages all aspects of turf and ornamental maintenance utilizing custom designed organic programs.  Bennett holds a Bachelors Degree in Turf and Plant Science from SUNY Cobleskill and is a Certified Pesticide Applicator.

Florin Trifan
Horticulture Supervisor

A native of Romania, Florin received his B.S. in Horticulture Operations and Management from Ion Ionescu de la Brad University of Agriculture Sciences and Veterinary Medicine in Iași, Romania. After emigrating from Romania to the United States, Florin utilized his education to manage greenhouses for approximately 14 years. He oversaw the planting, watering, fertilization and all other aspects of maintaining the plant material while managing labor crews and developing policies and increasing efficiencies.

Florin joined the Mahoney Associates, Inc. team in 2022 as our Horticulture Supervisor. Using his education and experience, he works closely with our Garden Maintenance crews to increase their knowledge and abilities to elevate the existing high level of quality that our clients have come to expect from Mahoney Associates, Inc.

“Mahoney Associates believes in keeping up continuing education that educates the management team on the newest developments in the horticultural field.”