The Morgan Library & Museum, which has been without a leader since late last summer, looked West to bring back a longtime New Yorker as its new director, choosing Colin B. Bailey, who has served since 2013 as director of the Fine Arts Museums of San Francisco but was for many years before that the chief curator at the Frick Collection.

Mr. Bailey, a well-regarded Renoir scholar, succeeds William M. Griswold, who left last year to take over the Cleveland Museum of Art. Mr. Bailey comes to the Morgan almost a decade after an expansion, designed by Renzo Piano, enlarged not only the museum’s floor plan but also its ambitions, moving it more actively into contemporary art, collaborations with other institutions and high-end acquisitions.