Chipotle Mexican Grill CEO Brian Niccol was named chairman of the board for the fast-casual restaurant chain. Niccol replaces company founder Steve Ells, who held that position for two years. Neil Flanzraich will continue to serve as lead independent director.

Niccol came to Chipotle in March 2018 after having served as CEO for quick-service restaurant chain Taco Bell. He also replaced Ells as Chipotle’s CEO. Chipotle began to implement its succession plan in November 2017 after the chain had experienced a series of operational challenges.