This is a market research Sources Sought Notice for engineering services to support the Trident II missile reentry subsystems for the Common Missile Compartment on Columbia Class submarines. The performance period would be from 1 March 2027 to 28 February 2032. The work involves digital engineering deliverables and supporting submarine design, construction, and test, with no on-site personnel required at the Washington Navy Yard. Respondents must demonstrate recent, relevant experience performing similar efforts with an annual incurred cost of at least $3.5 million. The notice strongly encourages responses from capable small businesses.