Bermudian re/insurer Endurance saw its operating profit more than half in 2016's fourth quarter after being hit by almost $60m of catastrophe claims during the period.
Krøger Kjær takes over in Copenhagen from Helle Lehmann who has stepped down.
Improved investment income offset a decline in underwriting income for the Bermuda-based reinsurer.
A broker and an analyst with Scandinavian expertise join reinsurance broker JLT Re.
Bermudian re/insurer Third Point Re was hit by both an underwriting and investment loss in the fourth quarter of 2016.
Third Point Re founder John Berger is stepping down as CEO at the beginning of March when he will be replaced by president and chief operating officer Robert Bredahl.
Edouard Schmid will succeed Matthias Weber in June.
The insurer has made its fourth major European appointment within the past two months.
Italian insurers are likely to face pressure in 2017 owing to their close ties to the country's troubled banking system.