The Department of Defense, specifically the Department of the Air Force, is soliciting proposals for the Cyber Support Services 3 (CSS3) Request for Proposal, aimed at sustaining the existing Air Force IT Infrastructure. This procurement is a Total Small Business Set-Aside under FAR 19.5, and it seeks to engage qualified small businesses to provide essential IT and telecom network support services. Proposals must comply with the solicitation requirements and be submitted in a timely manner, with the primary contact for inquiries being Daniel Koble, who can be reached at daniel.koble@us.af.mil or by phone at 781-225-0147. The solicitation has been amended to clarify the due date and time for proposals, emphasizing the importance of adherence to the specified guidelines.