Davis Polk & Wardwell’s co-head of M&A, Dennis Hersch, is to join key client JPMorgan as the New York powerhouse continues to staff the offices of some of the US’ biggest institutions.

Hersch, a Davis Polk partner since 1978 and M&A co-head alongside George Bason, is regarded as one of Wall Street’s top corporate advisers. He will serve as chair of JPMorgan’s M&A team.