Former President Barry Mills will become the interim chancellor at the University of Massachusetts Boston (UMass) effective July 1, after current chancellor J. Keith Motley announced his resignation on Wednesday.

Mills was named deputy chancellor and chief operating officer at UMass Boston on March 2, signing a five-year contract. He left Bowdoin in 2015 after serving as president of the College for 14 years.

UMass Boston is expecting to face a deficit of $30 million by July, the Boston Globe reported in March. Recent cuts have forced the university to lay off adjunct faculty, reduce the number of course offerings and cancel library database subscriptions. Internal memos indicated that UMass officials had been aware of budget problems since at least 2012.

UMass officials told the Boston Herald that Mills will not become permanent chancellor.

Motley will take a one-year sabbatical and then return to UMass Boston as a tenured faculty member, the university announced.