A little over three years ago the musically inclined Pierre Gentin took his keyboard and guitar from his office as head of global litigation at Credit Suisse bank in New York and joined the litigation group at Wall Street’s Cahill Gordon & Reindel. After 20 years in-house, Gentin said he wanted to “grow.”

This month Gentin continued that growth. He left the law firm to return in-house, as the new general counsel at international consultant firm McKinsey & Co.