From its inception, John P. Stopen Engineering Partnership has provided facility engineering services for projects in multiple industrial sectors. Below is a partial list of clientele for which the Firm has provided services:
| AUTOMOTIVE |
| New Process Gear (MAGNA Drivetrain) |
| PHARMACEUTICAL |
| Bristol-Myers Squibb (over 100 bio-processing and pharmaceutical plant projects) |
| Albany Molecular Research, Inc. (Syracuse Research Center and East Campus Facilities) |
| Mallinkrodt Pharmaceuticals |
| Norwich Pharmaceuticals |
| MEDICAL DIAGONISTIC INSTRUMENTATION |
| Welch Allyn |
| PACKAGING |
| Solvay Paperboard |
