Three midsize trial and litigation firms with offices spread across the East Coast are combining, crafting a unique business structure to promote synergy across their established platforms while allowing leaders from each to maintain a degree of autonomy over smaller elements of their operations.

Vaughan McLean, a Philadelphia-based insurance defense firm, is absorbing defense litigation firm Deasey, Mahoney & Valentini; the Vaughan McLean firm is then partnering with Goldberg Segalla founder Richard Cohen’s new firm Cohen Cunningham DeRose Higgins Lyon to create a 75-attorney, 18-office law firm called Cohen Vaughan.