Marsh & McLennan Companies Inc., was founded by Henry W. Marsh and Donald R. McLennan in 1871 and is headquartered in New York, New York. The company is a multinational professional services firm with business interests in insurance brokerage, risk management, reinsurance services, talent management, investment advisory, and management consulting. It is the parent company of various risk advisors and speciality consultants, including Marsh, the insurance broker; Guy Carpenter, the risk and reinsurance specialist; Mercer, the provider of advice and digital solutions that help organizations meet the health, wealth and career needs; and Oliver Wyman Group, the management and economic consultancy.