A former casualty treaty underwriter at Chubb Tempest Re Bermuda has been appointed chief operating officer, Global Reinsurance, at Chubb Limited.

Michael O'Donnell currently serves as division president of Chubb Tempest Re USA.

In his new role, he will continue to have responsibility for the US operations of Chubb Tempest Re while expanding his remit into the strategic and tactical operations of the company's global reinsurance operations.

Mr O'Donnell will continue to report to Jim Wixtead, senior vice-president Chubb Group and president Chubb Tempest Re.

Mr Wixtead said: "Mike is an exceptional executive who has demonstrated strong fortitude and leadership during his tenure managing our US reinsurance operations.

"Clients, brokers and colleagues respect Mike's insights and commitment to our mission at Chubb Tempest Re. I look forward to working with him as he expands his responsibilities within Global Re."

Mr O'Donnell joined Chubb Tempest Re Bermuda in 2006 as a casualty treaty underwriter.

He was promoted to senior vice-president with responsibility for ACE Tempest Re USA's workers compensation and alternative risk business units as well as oversight of its claims operations.

Since 2014, he has been responsible for Chubb's US property and casualty assumed reinsurance operation.