# Contract Modification for Acoustic Device Countermeasure (ADC) MK 5 Canonical: https://abierto.us/opportunities/n0002418c6209mod - Solicitation number: N0002418C6209MOD - Notice type: Presolicitation - Status: Closed. Deadline was May 8, 2026 at 5:00 PM EDT - Department: Department of the Navy - Agency: Department of the Navy - Contracting office: NAVSEA HQ (N00024) - NAICS: 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing - Product or service code: 5865 Electronic Countermeasures, Counter-Countermeasures and Quick Reaction Capability Equipment - Place of performance: Reston, Virginia - County: Fairfax County (FIPS 51059). https://abierto.us/counties/fairfax-county-va-51059 - City: Reston. https://abierto.us/cities/reston-va-5166672 - First posted: April 23, 2026 - Last posted: April 23, 2026 - SAM.gov: https://sam.gov/workspace/contract/opp/4212a271fd6b4d69a6e398726b6f98d1/view ## Description The Naval Sea Systems Command (NAVSEA) intends to award a contract modification to Leidos Holdings, Inc. under Contract No. N00024-18-C-6209. The modification will be issued using other than full and open competition pursuant to 10 U.S.C. § 3204(a)(1), as implemented by Federal Acquisition Regulation (FAR) 6.302-1. The Acoustic Device Countermeasure (ADC) MK 5 is an expendable, mobile acoustic countermeasure designed to increase a submarine’s survivability against torpedo threats. Leidos is the original developer of the ADC MK 5 system, and the Government does not currently possess a complete Technical Data Package (TDP) with build-to-print specifications. This action is required to procure additional Low-Rate Initial Production (LRIP) units and associated engineering support to meet critical fleet deployment and testing schedules. Leidos is determined to be the only available source capable of fulfilling these requirements without causing unacceptable schedule delays while the TDP is finalized for future full and open competition. Interested parties may express their interest and capability in response to this notice. Parties may submit a capability statement detailing their technical expertise and ability to fulfill the requirements, which will be considered by NAVSEA. Responses shall be submitted via email to christopher.t.venturino.civ@us.navy.mil and cc jennifer.l.kramer26civ@us.navy.mil and reference the solicitation number. No reimbursement will be made for any costs associated with providing information in response to this synopsis or any follow-up information requests. ## Publications - April 23, 2026: Presolicitation, due May 8, 2026 at 5:00 PM EDT. Notice 4212a271fd6b4d69a6e398726b6f98d1. https://sam.gov/workspace/contract/opp/4212a271fd6b4d69a6e398726b6f98d1/view ## Points of contact - Christopher Venturino, christopher.t.venturino.civ@us.navy.mil, 2027814464 - Jennifer Kramer, jennifer.l.kramer26.civ@us.navy.mil, 2027810480 --- Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/n0002418c6209mod.