This is a market research Sources Sought notice for professional Architect-Engineer services, including planning, design, and construction support, for projects at Ellsworth AFB, South Dakota. The anticipated contract is an IDIQ with a ceiling of $2,500,000 and a potential five-year period of performance, consisting of one base year and four option years. The government is seeking capability statements from interested firms to determine if the future acquisition can be set aside for small businesses under NAICS code 541330. Firms must demonstrate the ability to handle a wide range of engineering disciplines and respond to short performance timelines. Responses are required for consideration in this market survey.