Daniel Gallagher, a former commissioner with the U.S. Securities and Exchange Commission whose background includes stints in the financial services and pharmaceuticals industries, is returning to Wilmer Cutler Pickering Hale and Dorr as a partner.

For the last two years Gallagher has been chief legal officer at Mylan, a leading generic drug maker. He plans to leave Mylan in April and to begin practicing out of Wilmer’s Washington, D.C., and New York offices after Labor Day, serving as deputy chair of the firm’s securities department.