After two years as executive vice president and general counsel at Guardian Life Insurance Co. of America, Eric Dinallo has returned to Debevoise & Plimpton to chair the firm’s insurance regulatory practice.

Dinallo will also be a partner in the firm’s financial institutions and white-collar and regulatory defense groups. A former prosecutor, he spent four years as an assistant district attorney in New York County and another four years as chief of the Investor Protection Bureau at the New York State Office of the Attorney General.