Schafer's contract allows customers to order Schafer services under the following Special Item Numbers (SINs) and associated Primary Engineering Disciplines (PEDs):
| SIN Number | SIN Description | Primary Engineering Disciplines |
| 871-1 | Strategic Planning for Technology Programs/Activity | Electrical, Mechanical |
| 871-2 | Concept Development and Requirements Analysis | Electrical, Mechanical |
| 871-3 | System Design, Engineering and Integration | Electrical, Mechanical, Chemical |
| 871-4 | Test and Evaluation | Electrical, Mechanical |
| 871-5 | Integrated Logistics Support | Electrical, Mechanical |
| 871-6 | Acquisition and Life Cycle Management | Electrical, Mechanical |
Services NOT included in Contract
The following services are NOT solicited under this Contract:
- Construction and Architect-Engineering
- Computer Engineering and Information Technology
- Environmental Advisory Services (as listed in the Contract solicitation)
- Foundations and Landscaping Engineering
- Heating, Ventilation and Air Conditioning
- Research and Development (as set forth in FAR Part 35)
- Products/materials already solicited under other Federal Supply Service (FSS) Schedule contracts (such as Information Technology)