The Missile Defense Agency (MDA) of the Department of Defense intends to award a contract action to increase the ceiling of an existing contract for Threat Systems Engineering services. This action is necessary to meet the MDA's growing demand for specialized products and services that support critical defense initiatives, including legacy modeling and simulation tools and missile defense systems. The work requires advanced technical expertise that is currently only available from Systems Engineering Group, Inc. (SEG), ensuring continuity of essential operations without delays. Interested parties can reach out to Thomas Barbee at thomas.barbee@mda.mil or Nickolas Gatlin at nickolas.gatlin@mda.mil for further inquiries, as no formal solicitation package is available.