# SAM #822775931 Interim dark-fiber operation and maintenance for DISN CONUS Link 39 **Buyer:** DISA Telecommunications Division **Posted:** October 27, 2026 **Respond By:** November 11, 2026 **Identifier:** 822775931 **NAICS:** 517111, 517810, 51711 The Defense Information Systems Agency seeks interim support to keep DISN CONUS Link 39 dark fiber operational while a follow-on contract is pursued. - **Government buyer:** Defense Information Systems Agency (DISA), Telecommunications Division. - **Requirement:** Operation and maintenance of dark fiber supporting the Defense Information Systems Network (DISN) Continental United States (CONUS) Link 39. - Includes necessary supplies and programmatic, engineering, and other technical services. - **Procurement approach:** The notice describes an intended sole-source action to avoid a service lapse during transition to a competitively awarded follow-on contract. - **OEMs and vendors:** No product manufacturer, service provider, or prospective contractor is named. DISA is the government buyer. - **Products and quantities:** No specific products, quantities, or part numbers are identified. ### Description

This requirement requires all services and supplies necessary to perform the objective, to include programmatic, engineering, and other technical services to maintain current Operation and Maintenance Services for dark fiber. By Light Professional IT Services LLC is the current contractor, and award, via Other Than Full and Open Competition, Sole Source, in accordance with FAR 6.103-1, Only One Responsible Source and no other supplies or services will satisfy agency requirements, is intended to be made to By Light by November 30, 2026, in order to prevent a lapse in service, and unacceptable delays in fulfilling the agency's requirements while transition to the follow-on contract, which was competitively awarded, is completed. 

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