The Guardian Life Insurance company of America has appointed Deanna Mulligan as new CEO, effective 1 July 2011.

Mulligan will succeed Dennis Manning, who will remain with Guardian as executive chairman through his scheduled retirement in February 2012.

Concurrent with assuming the CEO role, Mulligan also will become a member of the Guardian board.

Mulligan joined Guardian in July 2008 as executive vice president in charge of the company’s individual life and disability business, and in October 2010 was promoted to president and chief operating officer.

Before Guardian, Mulligan ran her own consulting firm, advising insurance companies on strategic and operational issues.

Mulligan’s over 25 year career includes senior executive roles at New York Life, AXA Financial and McKinsey & Company at which she was a principal in the firm’s New York office.