Masiello takes charge of F-35 amid upgrades, delays, and Congressional scrutiny

Marine Lt. Gen. Gregory L. Masiello assumed leadership of the F-35 Joint Program Office (JPO) on 17 July 2025, taking charge at a time when America's most advanced fighter faces both technological transition and intense scrutiny from Congress and the Pentagon, as reported by Air & Space Forces Magazine.

Masiello steps in as the F-35 transitions to the Tech Refresh 3 (TR-3) configuration—the critical foundation for over 80 separate Block 4 upgrades designed to expand the jet’s combat capabilities . After a yearlong halt in deliveries, driven by incomplete TR-3 development, Lockheed Martin recently cleared its backlog, releasing jets with a truncated upgrade. While Lockheed claims the full TR-3 package is ready, it awaits formal government certification.

A finalized contract for Lots 18 and 19—covering nearly 300 aircraft across all US services and international buyers—remains unresolved, with costs expected to rise significantly compared to previous deals, owing to inflation, increased system complexity, and scaled-back US procurement. Meanwhile, production continues, with Lockheed shouldering over $700 million to maintain supply chain stability during negotiations.

The 2026 US budget slashes F-35 purchases to 47, down from the planned 74, reallocating funds to address readiness and sustainment shortfalls, as reported by Defense One. Congress remains divided—some lawmakers champion spares and maintenance over expanding the fleet, while others urge renewed commitment, touting the F-35’s value for deterrence and operational flexibility. The Senate has proposed partially restoring planned acquisitions, but delays and cost overruns remain top concerns.

Masiello's immediate challenges are certifying TR-3, finalizing production contracts, and restoring program confidence amid ongoing JPO reorganization talk. With global demand undiminished—the program recently gained Romania as its 20th international customer—the F-35’s future now hinges on bridging the modernization gap without losing sight of delivery, cost, and readiness.