S4, LLC

S4, LLC, operating as S4 Inc. and its subsidiaries, is a small disadvantaged business based in Vienna, Virginia that delivers IT infrastructure installation, cybersecurity services, and professional engineering support to the Department of Defense and civilian agencies as a prime contractor (90% of recent awards) and subcontractor. S4 is a minority-owned small disadvantaged business and holds subsidiary entity S4-SDC-JV LLC, itself a self-certified small disadvantaged business. The company competes predominantly under total small business set-asides across its ITES-3S delivery order footprint and full-and-open competition on its recently awarded OASIS+ vehicles and larger prime contract awards.

S4's capability portfolio centers on IT infrastructure modernization, network installation, and cybersecurity training delivery. Representative work includes a $581 thousand delivery order from Air Force Space Command for technical refresh of NORAD and USNORTHCOM headquarters operations centers and current operations space; a $469 thousand Army National Guard delivery order for document preparation and digitization of personally identifiable information microfiche files in Starke, Florida; and a $56.6 thousand California Army National Guard training delivery order for adversary tactics detection instruction. Smaller-magnitude work across the ITES-3S vehicle includes LAN drop installation, NIPR and SIPR network connection setup, and building wiring infrastructure at Eglin Air Force Base. S4 also holds federal grant recipient positions on three Air Force Research Sciences Program awards (CFDA 12.800) spanning antenna design, non-uniform gratings, and electromagnetic theory projects at Air Force Research Laboratory, with project completion dates ranging from June 2025 to July 2029.

Vehicle position anchors S4's competitive posture. The company holds a multi-award seat on the newly awarded OASIS+ Total Small Business Set-Aside IDIQ (December 2024, five-year base through December 2029) and an OASIS+ Unrestricted IDIQ (also awarded December 2024, same five-year term), positioning S4 to compete for governmentwide integrated professional services task orders across management, technical, engineering, research, intelligence, environmental, and facilities domains. S4 maintains an active presence on the Information Technology Enterprise Solutions 3 - Services (ITES-3S) vehicle with 28 delivery orders valued at $862 thousand combined, and on two large Air Force Materiel Command indefinite delivery contracts (FA251717D7000 and FA251712D9001) carrying 25 and 22 task orders respectively totaling $114.9 million and $59.6 million in combined potential value. The company also holds a GSA Multiple Award Schedule with ten active task orders.

Customer concentration reflects strong Air Force emphasis. The Department of the Air Force Space Command accounts for 64 awards (23% of all recent awards) valued at $123.5 million, followed by the Department of the Air Force proper at 13 awards worth $433.3 million. By potential value, the Army's PEO Enterprise Information Systems dominates the portfolio with two awards carrying $12.1 billion in combined potential value—a dominant outlier driven by large OASIS+ ceiling values. Air Combat Command places seven awards valued at $805.3 million. Together, these five customer entities represent 55% of award count and 69% of combined potential value. S4 serves 47 distinct federal agencies across the recent award footprint, reflecting broad government exposure.

Activity shows recent growth momentum after a relatively flat 2022-2023 period. S4 recorded seven awards in 2022, four in 2023, then seventeen in 2024, with two awards in 2025 and two in 2026 to date. The December 2024 OASIS+ awards represent significant vehicle expansion; however, the source does not provide task-order pipeline detail for these newly awarded vehicles. S4's subcontractor footprint concentrates under IBM, where S4 delivers computer programmer support on Logistics Data Acquisition Center IT enterprise support work through multiple 2024 modifications and renewals. S4 also subcontracts to Booz Allen Hamilton on EMAPS 2 cyber operations research, General Dynamics Information Technology on Strategic Command IT lifecycle support, and Sumaria Systems on F-16 Division engineering and administrative support services.

S4's Service Contract Inventory footprint is minimal, with only seven SCI records spanning FY2022–FY2024. The vendor reported zero SCI-invoiced prime contract revenue across those years, with sub-role activity showing roughly 16.4 FTEs in FY2022 declining to 9.7 FTEs in FY2024. The SCI dataset is a strict subset of the vendor's total federal services activity and does not capture the majority of S4's contract award volume. GSA Schedule labor portfolio spans 92 active categories priced from $42.40/hr (help desk support) through $203.00/hr (subject matter expert level), with representative mid-tier roles such as cybersecurity engineer III at $103.50/hr and IA subject matter expert II at $119.65/hr, indicating capacity across infrastructure, networking, and security engineering disciplines without cleared-labor offerings. S4's parent is Knexus Research LLC, a for-profit limited liability partnership, and the corporate structure carries one subsidiary in self-certified small disadvantaged business status.