Simpson Partner Joins Ex-Jones Day M&A Leader in Move to Sidley

A Simpson Thacher & Bartlett partner is leaving after less than three months at the firm to join his mentor Dave Grubman, who is now co-leading Sidley Austin’s global mergers and acquisitions practice.

New York-based M&A partner Adam Cromie announced the move to Sidley in an interview Friday. He left Simpson Thacher to work with Sidley’s M&A co-leader, Cromie said. Cromie had worked with Grubman for seven years at Jones Day before leaving to become a partner at Simpson in October.

The latest move was “almost exclusively because of my relationship with Dave,” Cromie said. “My experience at Simpson Thacher ...