| Midstate Mechanical & Electrical, LLC | | Dillsburg | PA | Engineer | Key Contacts | Active Projects |  .com/ |
| Orndorf & Associates | | Upper Darby | PA | Engineer | Key Contacts | Active Projects |  .com |
| Delval Equipment Corp. | | East Norriton | PA | Engineer | Key Contacts | Active Projects |  .com |
| Mulhern Consulting Engineers & Associates Inc | | Hatboro | PA | Engineer | Key Contacts | Active Projects |  .com |
| K & W Engineers (Kurowski & Wilson) | | Harrisburg | PA | Engineer | Key Contacts | Active Projects | .com/ |
| Bohlin Cywinski Jackson | | Wilkes-Barre | PA | Engineer | Key Contacts | Active Projects | .com |
| SSM Group, Inc. | | Allentown | PA | Engineer | Key Contacts | Active Projects | .com/ |
| McClure Company | | Harrisburg | PA | Engineer | Key Contacts | Active Projects | .com/ |
| Consolidated Engineers | | Leesport | PA | Engineer | Key Contacts | Active Projects |  .com |
| Chrisland Engineering | | Lebanon | PA | Engineer | Key Contacts | Active Projects | .com |
