The Senior Director will negotiate directly with U.S. Government contracting personnel, prime contractors, subcontractors, and other partners while advising Perimeter’s executive, legal, finance, business development, and program teams on contractual requirements, risks, and strategy. This person will serve as Perimeter’s lead contracts manager and principal subject-matter expert on federal contracting, supporting the business throughout the full acquisition lifecycle—from opportunity assessment and proposal development through negotiation, award administration, modification, and closeout.