Navy Secretary John Phelan departs amid Pentagon shakeup and shipbuilding tensions

John Phelan’s abrupt departure from the Navy put a hard spotlight on instability inside the Pentagon, not just on a single personnel change. Pentagon spokesman Sean Parnell said on April 22 that Phelan was “departing the administration, effective immediately,” and Undersecretary of the Navy Hung Cao was named acting secretary as the service confronted a leadership void at a sensitive moment.

The move landed after months of reported tension between Phelan and Defense Secretary Pete Hegseth and Deputy Defense Secretary Stephen Feinberg, including disputes over Navy shipbuilding plans. Reuters reported that Phelan had been fired, citing a U.S. official and a person familiar with the matter. The speed of the exit, coming without a public explanation from the Pentagon, signaled that the disagreement had broken down enough to force an immediate change at the top of the Department of the Navy.

Phelan’s removal is particularly jarring because he had only recently become the 79th secretary of the Navy. The Senate confirmed him on March 24, 2025, by a 62-30 vote, and he was sworn in the next day. At the time, he was described as the first person in more than 15 years to lead the Navy without prior military service, a notable break from the service’s traditional leadership profile. His tenure now ended while he was still closely tied to the Navy’s next budget push and public messaging around shipbuilding.

That work matters because the Navy’s FY2027 budget request includes $65.8 billion for shipbuilding and plans to procure 34 ships, a huge industrial and planning effort that depends on continuity at the top. Phelan had just spoken at the Navy League’s Sea-Air-Space symposium shortly before his departure, underscoring how suddenly the change hit a department that is trying to manage fleet recapitalization, industrial base constraints and global commitments at once.

His exit also widened a broader Pentagon shakeup under Hegseth. It followed the April 2 removal of Army Chief of Staff Gen. Randy George and came after earlier firings of other senior uniformed leaders, deepening the sense that senior military turnover has become a feature of the current defense leadership. For the Navy, the immediate question is whether acting leadership can preserve command continuity long enough to keep procurement, planning and shipbuilding timelines from slipping further under the strain of elevated global tension.