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William Demarest


William Demarest has been employed in the tree care industry for the last 47 years and has three decades of experience as a practicing tree surgeon and plant health care specialist. William is an ISA-certified arborist and has earned his qualification through the ISA as a Tree Risk Assessment practitioner.

William heads the company’s golf division, which oversees the arboriculture for more than a dozen prestigious courses. He also serves Emerald’s residential clients in Westchester County.

Outside of his career in arboriculture, William served four years in the U.S. Navy.

Emerald's crew was very respectful and professional, and you are always a phone call away! We know where to turn to in the future when we need help with our trees.Marina T.
Committed to the Highest Level of Care

With accreditations by ISA, the Tree Care Industry Association, and an impressive roster of master arborists and ISA-certified tree care professionals, Emerald is the most accredited company of its kind in New York and Connecticut.

Serving Residential & Commercial
Properties in Westchester County,
Fairfield County & NYC
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