This is a pre-solicitation notice for Base Operations Support Services at the Rock Island Arsenal in Rock Island, Illinois. The work includes building and property maintenance, operating a hydroelectric plant, maintaining several bridges, and providing pest management services. The potential contract has a performance period of up to nine years, structured as a four-year base period followed by a five-year option period. This requirement is set aside 100% for 8(a) program participants, and the anticipated contract will be a hybrid Firm Fixed Price and Time & Materials type. The solicitation will use a formal source selection process combining Technically Acceptable and Trade-off criteria.