Marsh McLennan (NYSE: MMC) brings together more than 85,000 experts in risk, strategy and people across @MarshGlobal, @GuyCarpenter, @Mercer, and @OliverWyman.Marsh McLennan is the world’s leading professional services firm in risk, strategy and people. We bring together experts from across our four global businesses — Marsh, Guy Carpenter, Mercer and Oliver Wyman — to help make organizations more successful and societies more resilient.

Core values

- Marsh McLennan has a long-standing commitment to Environmental, Social, and Governance (ESG) initiatives, which includes addressing climate change, human capital management, cybersecurity, and other critical societal issues[2][4].
- The company's ESG strategy is integrated into its decision-making processes and is overseen by a Board ESG Committee, ensuring consistent and transparent efforts[4].
- Through programs like Marsh Cares, the company engages thousands of colleagues in volunteering initiatives, mentoring, and disaster resiliency, which directly support at-risk communities and build more resilient societies[1][2].
- Marsh McLennan aims to become net-zero across its operations globally by 2050 and has made significant progress against its climate commitments[4].