Prior to joining KPMG in 2014, he spent 12 years at Chubb legacy ACE, where he was latterly chief actuary for its risk management and foreign casualty divisions.
Aspen said his arrival “marks the rebuilding” of its actuarial function as part of the group’s operational, strategic, and cultural transformation that “continues to gather momentum”.
He will report into executive chairman and group chief executive officer Mark Cloutier and will be responsible for overseeing Aspen’s core actuarial services.
Miller said: “It is tremendously exciting to join the Aspen team at this stage in its journey. I am looking forward to working collaboratively with my new colleagues – and harnessing our combined expertise to support the wider business.”