This opportunity establishes a Multiple Award Contract (MAC) for vertical construction services, including design-bid-build and design-build, to support military renovation and construction projects. Work will primarily occur at Malmstrom AFB, Montana, including its Launch Facilities and Missile Alert Facilities, and may involve repair, renovation, alteration, and demolition of structures and building systems. The contract has an estimated ceiling of $99,999,999.99, with an initial ordering period of five years plus a two-year option, for a potential total of seven years. The seed project is the DSN/CSN Repair Bldg. 1082 HVAC project at Malmstrom AFB, requiring conceptual documents for two cooling and humidification courses of action, with one selected for 65% and then 100% design. The seed project’s period of performance is 242 calendar days after notice to proceed, with construction potentially starting after acceptance of the 65% design.