The Los Angeles County Museum of Art on Thursday said that Melody Kanschat will be leaving her position of chief operating officer in May.

Kanschat, who has held several roles with LACMA since 1989, has been COO and president since July 2005. She is responsible for the day-to-day operations of the museum and overseeing its $60 million annual budget. She also is overseeing the museum’s $150 million expansion that includes the Broad Contemporary Art Museum, Lynda and Stewart Resnick Exhibition Pavilion and the new Ray’s restaurant and Stark Bar set to open in March.

“Melody has helped lead LACMA through a period of unprecedented growth, not only in land and buildings, but in the increasing public accessibility of the museum that she has championed during her entire career here of more than two decades,” Chief Executive Michael Govan said in a statement. “We will miss her steady hand, extraordinary administrative skill, big appetite for new challenges, and her drive for excellence and accessibility in equal measure.”