| 918.42 Engineering Consulting |
| 925.17 Civil Engineering |
| 925.28 Drainage Engineering |
| 925.33 Engineer Services, Professional |
| 925.35 Environmental Engineering |
| 925.36 Engineering Services (Not Otherwise Classified) |
| 925.38 Field Engineering |
| 925.44 General Construction: Management, Scheduling, Cost Estimation - Engineering |
| 925.49 Highways; Streets; Airport Pay-Parking Lots - Engineering |
| 925.55 Inspecting, General/Engineering |
| 925.58 Irrigation; Drainage; Flood Control/Engineering |
| 925.61 Land Development and Planning/Engineering |
| 925.70 Municipal Engineering |
| 925.77 Pollution Control Engineering |
| 925.83 Sanitary Engineering |
| 925.96 Waste Water Treatment Engineering |
| 925.97 Water Supply, Treatment, and Distribution/Engineering |
| 968.47 Inspection Services, Construction Type |