| # | Company name | Role | # of projects |
|---|---|---|---|
| 181 | ECE Group Limited | MEP engineering | 26 |
| 182 | Edgar Rottenfusser | MEP engineering | 3 |
| 183 | Edward J. Zahorak | MEP engineering | 1 |
| 184 | Edward Pearce & Partners | MEP engineering | 0 |
| 185 | EKJ Rådgivende Ingeniører a/s | MEP engineering | 2 |
| 186 | Elara Energy Services, Inc. | MEP engineering | 1 |
| 187 | Elecnor | MEP engineering | 7 |
| 188 | ElekEn Associates | MEP engineering | 8 |
| 189 | Elemecs Electrical India | MEP engineering | 1 |
| 190 | Elithis | MEP engineering | 2 |
| 191 | Emerald City Engineers, Inc. | MEP engineering | 1 |
| 192 | EN, Inc. | MEP engineering | 2 |
| 193 | Encompass Mechanical Services-Southwest Florida | MEP engineering | 4 |
| 194 | Energy Concepts Engineering PC | MEP engineering | 5 |
| 195 | Engelmann + Locker GbR | MEP engineering | 1 |
| 196 | Engelmann Energiesysteme GmbH | MEP engineering | 1 |
| 197 | Engineered Business Environments | MEP engineering | 1 |
| 198 | Engineering Design Group, Inc. | MEP engineering | 8 |
| 199 | Engineering Professionals, Inc. | MEP engineering | 11 |
| 200 | Engineering Services Consultancy Limited | MEP engineering | 2 |