28--ENGINE, DIESEL, IN REPAIR/MODIFICATION OF
DEPT OF DEFENSE.DEPT OF THE NAVY.NAVSUP.NAVSUP WEAPON SYSTEMS SUPPORT.NAVSUP WSS PHILADELPHIA.NAVSUP WEAPON SYSTEMS SUPPORT · Response deadline: Tue, 03 Nov 2026
What the government is buying
The Navy's Naval Supply Systems Command (NAVSUP) Weapon Systems Support Philadelphia is soliciting for work involving a diesel engine in repair or modification. This is a sole-source or competitive acquisition under the broader category of engines and components classified under Federal Supply Classification (FSC) 2815.
FSC 2815 covers diesel engines and components, excluding those designed primarily for locomotive, marine, or tank use. Repair and modification work in this category typically includes overhaul, refurbishment, reconditioning, or engineering changes to existing diesel engine systems to restore or improve performance, extend service life, or meet updated technical requirements. This type of contract frequently involves depot-level maintenance, component rebuilding, reverse engineering, or compliance with military specifications and technical data packages.
Given NAVSUP WSS's role as the Navy's primary provider of weapon systems logistics support, this requirement likely supports fleet readiness for surface ships, submarines, or shore-based equipment that relies on diesel power generation or propulsion auxiliary systems.
Key facts
| Field | Value |
|---|---|
| Agency | Department of the Navy, NAVSUP Weapon Systems Support Philadelphia |
| Notice type | Solicitation |
| Solicitation number | N0038326QPC11 |
| NAICS | 333618 — Other Engine Equipment Manufacturing |
| Set-aside | None (unrestricted) |
| Response deadline | November 3, 2026 at 4:30 PM ET |
| Place of performance | see the solicitation |
Who can bid
This is an unrestricted solicitation with no set-aside, meaning any responsible U.S. business entity—regardless of size—may compete. Small businesses, large businesses, and non-traditional defense contractors are all eligible.
NAICS 333618 (Other Engine Equipment Manufacturing) carries a 1,000-employee size standard for SBA small business eligibility. Companies with 1,000 or fewer employees qualify as small under this code. However, because no set-aside applies, small business size status does not affect eligibility to bid—it only matters for subcontracting plans or other reporting if the contract exceeds applicable thresholds.
Bidders should be prepared to demonstrate:
- Capability to perform diesel engine repair/modification to military or comparable commercial standards
- Quality management systems (typically ISO 9001 or AS9100, or compliance with MIL-STD requirements)
- Security clearance requirements and facility clearances if the engine or technical data is classified
- Past performance evidence, especially with DOD or NAVSUP
How to put together a competitive bid
For engine repair and modification solicitations, competitive bids typically succeed on technical capability, price discipline, and schedule assurance:
Technical approach: Detail your repair methodology, inspection and testing protocols, and how you will achieve the technical specifications. NAVSUP WSS contracts emphasize adherence to technical data packages and military standards. Identify any deviations or contractor-proposed improvements clearly, with justification.
Quality and traceability: Diesel engine work for the Navy requires rigorous material traceability, non-destructive testing, and documentation. Specify your quality control processes, source inspection protocols, and calibration procedures.
Pricing structure: Break out labor categories, material costs, overhead, and profit. If this is a time-and-materials or cost-reimbursement type contract, ensure your provisional billing rates and cost buildup are Defense Contract Audit Agency (DCAA)-compliant. See the solicitation for specific pricing format requirements.
Past performance: Include relevant contracts for diesel engine overhaul, military component repair, or similar industrial machinery work. Navy-specific or DOD maintenance experience strengthens competitiveness.
Small business elements: Even without a set-aside, consider if subcontracting opportunities can enhance your proposal or if you qualify for any socioeconomic credit.
Next steps
Read the full solicitation on SAM.gov by searching solicitation number N0038326QPC11 or the notice title. The posting date was October 28, 2026.
Review all technical attachments, data requirements, and certifications—engine repair solicitations typically include extensive specifications, drawings, and quality clauses that govern acceptability.
Confirm your SAM.gov registration is active and that your entity profile is current and accurate.
Submit your proposal by November 3, 2026 at 4:30 PM Eastern Time. Late submissions are generally inadmissible in NAVSUP acquisitions.
Given the limited time between posting and deadline (approximately six days), interested bidders should act immediately to access documents and assess feasibility.
View the official notice on SAM.gov →