Mayhew will be based in London and report to Tom Davies, global CEO, Bowring Marsh.
In this role, Mayhew will lead Bowring Marsh’s London-based team of international placement specialists and provide risk transfer solutions, benchmarking, and claims advocacy services to clients through Marsh’s global network.
She will also work closely with Marsh’s international placement leaders across 10 regional placement hubs to develop solutions that support clients’ insurance and risk management objectives.
Mayhew succeeds Ryan Bond, who has been appointed as head of climate and sustainability insurance innovation.
Mayhew joined the business in 1995, focusing on the design of solutions for complex risks in the global insurance market.
Davies said: “Organisations are facing an increasingly complex and often volatile risk environment. Justine is a highly-respected leader who has an in-depth understanding of client needs around the world.
“Under her leadership, Bowring Marsh’s UK business is well-placed to support our clients as they pursue their growth agendas.”
Mayhew added: “Increasingly, organisations require specialist expertise to help quantify and manage their complex risks. Marsh’s international placement business has a hard-earned reputation for innovation and creativity across the insurance hubs in which it operates. I look forward to leading the team and helping our clients continue to grow and thrive.”