Procurement delays and civilian-market freezes strain advisory-led FSIs, but mission-centric contractors leverage defense and intelligence demand to offset shutdown-related headwinds heading into FFY26 The 43-day U.S. federal government shutdown, the longest in history, came to a welcome end on Nov. 13, 2025, but for some federal systems integrators (FSIs), the shutdown’s impact could linger well into federal fiscal year 2026 (FFY26).