It has excluded support for the most carbon-intensive companies.
Group property and casualty businesses hit by large losses.
Greg Hendrick has left the group.
The ratings agency views the outlook of UK's non-life company market as "already week".
The re/insurance hub was added on the blacklist in March 2019 for failing to meet good tax governance standards.
He will have overall responsibility for the leadership, strategy and execution of the division.
If a merger discussion is agreed, both companies will sign a non-binding MoU and seek necessary regulatory approvals.
The new hires come from Allianz, RT Specialty, Crum & Forster, and CoverX Specialty.
The executive specialises in international and US downstream energy market risks.
Larry Haefner is retiring on December 31, 2020 after a 40-year insurance career.