After 20 years at Wachtell, Lipton, Rosen & Katz, Gavin Solotar is set to become one of the rare partners to depart the top-ranked Am Law 100 firm on his way to becoming a managing director and the general counsel at New York–based boutique investment bank Greenhill & Co.

Greenhill announced Tuesday that Solotar, a veteran corporate partner at Wachtell, will make the move in-house in September. Greenhill CEO Scott Bok, who worked at Wachtell during the mid-eighties, said in a statement that his firm valued Solotar’s combination of experience in the financial and legal fields.