& 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 turf and grass 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 above all,  our investment in 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 is in Our Roots

We believe in planting seeds and nurturing relationships. Mahoney Associates has deep roots on the East End and we are committed to honoring the 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's evident in our wholistic approach to landscape design and service. We value our clients, our team, our community and our environment and we take a wholistic 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 involve ourselves in the 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 even make and custom blend all of our compost and mulch in-house custom 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.

Michael Maskiell, account manager with landscaping company Mahoney Associates

Michael Maskiell
Production Manager

A graduate of SUNY Cobleskill with a degree in Applied Science and Turf Management, Michael has over 28 years of experience in the field.  A key member of the Mahoney Associates management team since 2008, Michael manages all production, firm-wide.  He holds a Certified Pesticide Applicator License, is an Alumni of LDP, has a certificate from Suffolk County Executive Office of Consumer Affairs Certificate for Organic Applications and is an alumni of MYT (Maximize your Talent).

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Bennett Swezey
Production Supervisor

Bennett Swezey has a Bachelors of Turf Grass from SUNY Cobleskill and is a Certified Pesticide Applicator.  Bennett began his career with Mahoney Associates in 2019.  He manages all aspects of turf and ornamental maintenance utlizing custom designed organic application programs.

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