Jack in the Box has named former Taco Bell chief Mark King as interim CEO, replacing Lance Tucker just 14 months after Tucker officially took over the role.
The leadership shake-up comes at a difficult moment for the burger chain, which is grappling with declining same-store sales, investor pressure, board restructuring, and broader operational challenges across the quick-service restaurant sector.
The company said King, who became chairman in March 2026 after joining the board in late 2025, will now serve as Executive Chairman and Interim CEO effective immediately. Board member Alan Smolinisky has also been appointed lead independent director.
In its announcement, Jack in the Box said King’s immediate focus will be accelerating the company’s turnaround strategy, known internally as “JACK on Track,” a plan introduced under Tucker aimed at simplifying operations, improving margins, and reducing debt.
King brings decades of franchise and restaurant leadership experience to the role. Before joining Jack in the Box, he served as CEO of Taco Bell and later led Xponential Fitness, where he focused heavily on franchisee relationships and operational performance.
The executive transition arrives alongside weak quarterly performance. Jack in the Box reported a 3.8% decline in same-store sales for the quarter ending April 12, marking the brand’s fifth consecutive quarterly decline.
Tucker’s exit also extends what has become a highly unstable period for the company’s leadership structure. Former CEO Darin Harris departed in early 2025, after which Tucker—then newly appointed CFO—was elevated to interim CEO before being given the permanent role weeks later.
At the same time, Jack in the Box has been reshaping its board. Over recent months, the company added restaurant industry veterans including Eduardo Luz while longtime directors stepped down following pressure tied to activist investor scrutiny. (Nation’s Restaurant News)
The company now faces a balancing act familiar to many legacy quick-service chains: modernize operations fast enough to reignite growth while managing franchisee economics, debt loads, and increasingly cautious consumer spending.
