In order to promote creativity and cooperation within business units, Liston will work with executives from Marsh, Mercer, Guy Carpenter, and Oliver Wyman in his new position. His priorities will be maximizing the impact for clients and promoting company expansion in the US and Canada.

He will be answering to Hans van Heukelum, the Marsh McLennan global CCO, and Pat Tomlinson, the CEO of Marsh McLennan US and Canada and President of Mercer.


Liston, who was previously the Corporate Segment Leader for Marsh US and Canada, adds a plethora of knowledge to his new role.

Additionally, he was a major force behind the region's mid-market offers. His appointment comes after Susan Potter's earlier this year promotion to President of Mercer US and Canada.

Liston has over thirty years of experience at Marsh and has held a number of leadership and client-facing positions. He has held positions with Marsh as the US Sales and Marketing Leader, Head of the Seattle Office, and Head of the New York Office.

"David's client-first attitude, extensive leadership experience, and collaboration mindset will bring immense value to our colleagues, clients, and business," stated Pat Tomlinson, President of Mercer and CEO of Marsh McLennan US and Canada.

"Two things that inspire me about Marsh McLennan are the scope of our expertise and the actionable solutions we offer clients across our four businesses," continued Marsh Chief Commercial Officer (CCO) David Liston for the US and Canada. In order to give our clients cutting-edge solutions that help them succeed in the demanding business climate of today, Pat and I are excited to work together across the entire organization.

The top professional services company in the world for risk, strategy, and human resources is Marsh McLennan.


Marsh McLennan advises clients in more than 130 countries with over 85,000 associates, bringing about $23 billion annually in revenue. Mercer, Guy Carpenter, Oliver Wyman, and Marsh are the four market-leading businesses that make up the corporation.

Guy Carpenter creates innovative risk, reinsurance, and capital strategies; Marsh offers data-driven risk advising services and insurance solutions. In order to help employers reimagine work, retirement, investment results, and health and wellbeing for a changing workforce, Mercer provides advice and technology-driven solutions.