Two Chester County contractors are new to the top 10 of the Philadelphia Business Journal’s 2026 ranking of the largest specialty trade contractors in Greater Philadelphia, compiled by researcher Todd Romero.
Kennett Square-based The Tri-M Group LLC debuted at No. 2, the highest of the four newcomers, with 500 local employees and 545 workers companywide.
The company traces its roots to 1964, when brothers Tom and Dick Musser opened a small electrical contracting business in Kennett Square…