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

The National Institute of Environmental Health Sciences (NIEHS), part of the National Institutes of Health under the Department of Health and Human Services, is issuing a Notice of Intent to Sole Source a contract modification for Support Services for Epidemiology. The procurement covers specialized epidemiological, scientific, technical, data management, regulatory, and IT infrastructure services to support mission-critical environmental health research. Key requirements include providing uninterrupted support to Principal Investigators across long-running studies, managing biorepository facilities and biological samples, maintaining validated databases and laboratory systems, conducting subject identification and enrollment, and administering epidemiological studies. The Government asserts that the incumbent contractor is the sole responsible source due to unique qualifications, historical knowledge of ongoing studies, custodial responsibility for sensitive data and biospecimens, established regulatory compliance infrastructure, and operational readiness. Interested parties may submit written capabilities statements by March 4, 2026 at 4:00 p.m. EST to demonstrate bona fide capability to fulfill the requirement, with the reference number HHSN273201600003I in the subject line, directed to Sarah Bank (sarah.bank@nih.gov) and Lisa Schaupp (lisa.schaupp@nih.gov).

This is not a set-aside contract and represents a sole source modification to the existing Indefinite Delivery, Indefinite Quantity (IDIQ) contract HHSN273201600003I currently held by Social & Scientific Systems, Inc. (SSS) and DLH, LLC. The modification extends the ordering period by 24 months, from June 29, 2026 through June 29, 2028, and increases the IDIQ ceiling by $20,000,000, raising the total contract value from $112,000,000 to $132,000,000. The Government will not issue a Request for Proposal and is not committed to award based on capabilities statements submitted in response to this notice. NIH will not reimburse costs incurred by interested parties in responding to this notice. This modification is intended to ensure continuation of mission-critical research while the NIH procurement team pursues re-competition of these services under a new full and open cost reimbursement contract.