Richard Hartunian, who served as U.S. attorney for the Northern District of New York from 2010 until last month, said Tuesday he will join Manatt, Phelps & Phillips as a partner in the firm’s corporate investigations and white-collar defense group.

Hartunian announced last month he would step down after seven-and-a-half years as U.S. attorney. He is scheduled to officially join Manatt’s Manhattan and Albany offices in August, the firm announced Tuesday. First Assistant U.S. Attorney Grant Jaquith became acting U.S. attorney for the Northern District of New York on July 1.