Our Service Map

Having served 45 states over the past 34 years has provided us with the opportunity to share state experiences to help state programs and those they serve.

We are proud of the longevity in service to our clients, along with the breadth of services provided.

We believe this distinguishes Mercer from our competitors. We bring the right mix of battle-tested experts and multi‑disciplinary practitioners to the table to shape real-world solutions and face the toughest issues.

Achieving Success Together

Delaware Results

HCBS Transition Plan

Delaware is only the sixth state to receive CMS final approval of its plan. Mercer is proud to have worked with Delaware over the past few months to respond to the outstanding CMS issues.

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NRGs Compendium

Mercer Contributes to NGAs Medicaid Compendium

NGA's Medicaid Healthcare Purchasing Compendium released in 2016, is "intended to serve as a reference guide for states when purchasing health care services for their Medicaid program..."

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GSA Contract

GSA Contract #GS-10F-0262L

Providing services to our government clients since 2001. Mercer is a proud holder of a Federal Supply Schedule MOBIS contract SIN# 874.1 and 874.6

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Marsh & McLennan Companies

Along with Mercer GHSC's breadth of experience, we have the additional resources from our broader company, Mercer Human Resource Consulting, and our parent organization, Marsh & McLennan Companies.


As part of Marsh, we are also able to leverage relationships with our sister companies - Oliver Wyman and Guy Carpenter.

Marsh & McLennan Companies (MMC) has been in business for over 140 years and has offices in over 100 countries with 110,000 employees worldwide. Marsh & McLennan Companies' history dates back to 1871. Marsh, the risk and insurance services subsidiary, has a distinguished history as the world's leading insurance broker and risk management advisor.

In 1923 MMC made its first major business extension – into reinsurance broking – with the acquisition of the newly formed Guy Carpenter & Company.

In 1959, MMC expanded into human resource consulting, acquiring Canadian benefits consultant William M. Mercer Limited. Today, Mercer is a global leader for HR and related financial advice, products, and services. In the 1980s, MMC expanded into specialty consulting. Today, the Oliver Wyman Group delivers management consulting through Oliver Wyman, corporate branding and identity consulting through Lippincott, and economic analysis and advice through NERA Economic Consulting.