Susan Levy—who has spent her entire legal career at Jenner & Block and became managing partner in 2008—will leave the Chicago-based Am Law 100 firm as of May 1 to become general counsel of financial services giant Northern Trust Corp., a Jenner client.

“While we are very sad to see her leave the firm, we are exceedingly proud of what she has accomplished,” said a statement by Jenner chairman Anton “Tony” Valukas. “She will be missed.”