The new venture aims to provide D&O insurance at a time of unprecedented upheaval within the market.
Tim Turner has been named new president of Ryan Specialty Group.
The UK insurer is to be acquired by Canada's Intact Financial and Scandinavian insurer Tryg.
Re/insurance giants Munich Re, Swiss Re, SCOR, AIG, AXA, Allianz and Chubb come together to develop new climate risk assessment tools.
The new group brings together more than 25 wholesale brands across 45 locations throughout the US and London.
The partnership will bring commercial US brokers instant access to the London Market.
The insurer's chief executive Thomas Buberl is confident in its earnings outlook for 2021.
Hannover Re and Fidelis provided significant capacity for the new three-year placement.
The exec brings 30 years of reinsurance experience gained at RenRe, Guy Carpenter and Aon.
The move will lead to the departure of HDI Ireland general manager who led the business for 10 years.