We Build the USA Challenge

We Build the USA Tri-M

The Tri-M Group proudly accepted Worth & Company's "We Build the USA" Challenge. Tri-M is proud to support the "We Build the USA" initiative; promoting careers in construction, recognizing the outstanding work of America's skilled trades people, and helping to provide scholarships to future skilled workers.

The Tri-M Group

What started as a two-person electrical contracting company 50 years ago, today provides comprehensive electrical solutions to some of the worlds' most demanding companies. The Tri‑M Group, founded by Tom and Dick Musser in Kennett Square in 1964 has been offering comprehensive solutions and services to help our clients grow their operations, solve their most difficult facility and energy related problems, and meet their toughest deadlines.

Our clients rely on us to perform well in the most demanding situations where mistakes are not permissible and where safety and security are at a premium. From sensitive environments like health care and pharmaceutical facilities, to high security environments like government and military installations, our clients have come to expect excellent performance and great solutions in everything we do.

Technology has changed since we opened our doors in 1964, but our commitment to our clients, our employees and our community has remained the same. The growth of our business and the developments in technology enable us to offer our clients Total Electrical Solutions. But our fifty-year track record of great performance and reliability allows us to call ourselves One Trusted Partner.

Read MoreRead More


Safety First & Always


We strive to provide a safety process that protects the health and welfare of all our personnel. Remember to put your thinking cap on every time you're on a job. We want you protected along with customers and the public.

Read MoreRead More

Total Electrical Solutions

Total Electrical Services

Working With You to Deliver Custom Integrated Solutions.

Tri‑M has tremendous depth of experience and expertise in ALL of the industrial and commercial electrical disciplines

Read MoreRead More




It’s GPS for your project. . .

Project status is available 24/7 and 365 days per year.

Read MoreRead More