This is a market research notice for a potential future Multiple Award Construction Contract (MACC) for mechanical, electrical, plumbing, and fire protection projects at Naval Station Great Lakes and surrounding support centers within a 450-mile radius, including several Midwestern states. The total estimated construction cost for all contracts over a potential five-year period is $120,000,000, with individual projects typically ranging from $25,000 to $750,000. The anticipated contract award is January 2027, and the contract would have a one-year base period with four one-year options. The notice seeks responses specifically from capable small businesses, including service-disabled veteran-owned and other designated categories, to help the government decide if the procurement should be set aside for small business competition. Responses to this sources sought notice are required to determine contractor capability and interest.