Support Services for Epidemiology - NIEHS
Awarded Limited / Sole Source Justification Posted
- Solicitation number
- HHSN273201600003I
- Agency
-
National Institute of Child Health and Human Development
National Institutes of Health, Department of Health and Human Services
- Set-aside
- No set-aside
Opportunity facts
- Contract number
- HHSN273201600003I Federal IDV award
- NAICS code
- 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- PSC
- AJ11 General Science And Technology R&D Services; General Science And Technology; Basic Research
- Place of performance
- Silver Spring, Maryland, United States
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The National Institute of Environmental Health Sciences, a division of the National Institutes of Health under the Department of Health and Human Services, has awarded a modification to extend and increase the ceiling of its Support Services for Epidemiology IDIQ contract (HHSN273201600003I) to Social & Scientific Systems Inc. on a sole-source basis, increasing the contract ceiling from $112 million to $132 million (an additional $20 million) with an award date of June 29, 2026.
The justification cites 41 U.S.C. 3304(a)(1) under FAR 6.302-1, only one responsible source. The rationale centers on continuity of mission-critical epidemiological research. The contract provides epidemiological, scientific, technical, data management, statistical, and regulatory support services to the NIEHS Epidemiology Branch, including subject recruitment and enrollment, data collection and management, biological and environmental specimen processing and storage, biorepository operations, and quality assurance across domestic and international study sites. Transitioning to a new contractor would require approximately 10 months and incur transition costs estimated at $9 million, while introducing substantial risks to ongoing longitudinal studies, including participant loss and data collection disruption. A presolicitation notice posted February 17, 2026, on SAM.gov with a March 4, 2026 deadline for capability statements received no responses.
The modification extends the ordering period through June 29, 2028, with the ceiling increase based on 3 percent annual inflation escalation totaling $16.8 million and $3.2 million for unanticipated follow-on studies and emerging research efforts. The extension is intended to provide approximately 24 months for acquisition planning and a full and open competitive recompete.
Notice text
HHSN73201600003I - Support Services for Epidemiology
Notification: Justification for Other than Full and Open Competition (J&A) - Approved 06/09/2026 (attached)
Modification 11 - IDIQ Contract Extension and IDIQ Ceiling Increase
Awarded contract HHSN273201600003I to unknown vendor for unknown amount on 2026-06-29.
Files
| File | Type | Posted |
|---|---|---|
| JA_SSS_HHSN273201600003I_PDF_Final 6.9.26.pdf |
Notice history
| Notice | Type | Posted |
|---|---|---|
| This notice | Limited / Sole Source Justification | |
| Notice of Intent to Sole Source - NIEHS Support Services for Epidemiology - Contract HHSN273201600003I- Extension of Ordering Period for IDIQ Contract and Increase to IDIQ Ceiling | Pre-Solicitation | |
| Support Services for Epidemiology - IDIQ Ceiling Increase | Pre-Solicitation |
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