The former head of the U.K.'s Serious Fraud Office Sir David Green QC has joined U.S. litigation firm Cohen & Gresser, several months after he left his consultancy role at Slaughter and May.

Cohen & Gresser launched a London office in 2018 and has expanded its nascent base slowly since then. Green joins as a partner in the firm's white collar defense and regulation practice group, which also features heavyweight white collar crime partner Richard Kovalevsky QC, who joined from Stewarts in 2020.