Arcadian Risk Capital, a specialty managing general agent (MGA) operating across Bermuda, Ireland, the UK and the US, has appointed Matthew Mullen as Executive Vice President as the company establishes a new presence in the US Enterprise Casualty market.
Mullen, who will be based in New York, has been appointed to oversee the development of Arcadian’s Enterprise risk offering. The role will involve working with retail distribution partners and brokers, with Arcadian looking to draw on Mullen’s existing relationships across the US specialty insurance market.
According to Arcadian, the new portfolio will focus on excess business, with risks assessed according to their characteristics and distributed across a number of sectors. The MGA has also arranged multi-year underwriting capacity for the new operation.
Mullen has more than 35 years’ experience in insurance underwriting, having held a number of senior positions within the US specialty market. Before joining Arcadian, he was Managing Director, Specialty Insurance at Markel. His previous roles include senior underwriting positions at Alterra, XL and Munich Re.
John Boylan, Chief Executive Officer of Arcadian, commented: “We are very pleased to have Matt join Arcadian and lead this new initiative. He brings a deep understanding of the market, strong distribution relationships and, importantly, an underwriting philosophy that is highly aligned with ours. His experience and reputation will be valuable as we establish and grow this business, while continuing to maintain the disciplined approach that underpins Arcadian’s underwriting strategy.”
Mullen added: “I am excited to join Arcadian and build this business as part of a platform with a strong underwriting culture and a clear commitment to long-term growth. Arcadian provides an attractive combination of experienced leadership, strong market relationships and the flexibility to develop a differentiated underwriting proposition. I look forward to working with the team to establish a high-quality and sustainable portfolio in the US market.”
Arcadian’s latest appointment comes as the company continues to develop its wider platform. In January 2026, the MGA received a growth investment from Lee Equity Partners, LLC, a middle-market investment firm that focuses on financial and healthcare services.
The investment followed Arcadian’s expansion across its existing markets and provides additional backing as the company develops new lines of specialty insurance business, including its Enterprise Casualty operation in the US.
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