MEP Services is a powerful family of specialty contractors strategically positioned across the Northeast. Trystate serves as our New York City based expert, deeply rooted in one of the most complex construction and facilities markets in the country. H.T. Lyons brings a broad regional presence throughout the Northeast, while B‑G Mechanical and Fred Williams anchor our operations in the Greater Boston area. Together, these companies create a unified platform with unmatched reach, expertise, and local knowledge.
With more than 700 skilled professionals and 11 offices, the MEP Services family supports clients throughout Pennsylvania, Maryland, Delaware, New Jersey, New York, Massachusetts, New Hampshire, Rhode Island, Connecticut, Vermont, and the Carolinas. We also support national clients with multiple locations across the United States, providing consistent service delivery wherever they operate.
The MEP Services group includes four highly respected companies — H.T. Lyons, Trystate, B‑G Mechanical, and Fred Williams — each recognized for technical excellence, responsiveness, and long-standing customer relationships. Together, they form a single, integrated team capable of handling projects of any size or complexity.
As part of EQUANS North America, MEP Services leverages the technical depth, innovation, and financial strength of a global organization. This backing allows us to deliver a full spectrum of solutions for commercial, industrial, municipal, and institutional facilities, making MEP Services a true single-source partner for both planned work and emergency response.
Our capabilities span energy transition and efficiency solutions, project engineering and management, construction and construction management, planning and design, prefabrication and modularization, building controls upgrades, comprehensive facility maintenance and operations.
Because we are supplier‑agnostic, we focus solely on what works best for our clients, selecting the optimal technologies and brands to meet specific goals for safety, sustainability, efficiency, comfort, and long-term resiliency.
Some of our affiliations and associations, include:
