The CEO also said the insurer was successful in achieving meaningful improvement in renewal premiums.
Five executives have been made executive vice presidents under Scott Jean.
She replaces Ann Alexander who recently retired from the business.
Financial sector remains an area of high risk.
The recent hailstorm event impacts expectations.
It has grown its portfolio by 50%.
Zurich-owned insurer accelerates growth in marine trade market
Insured losses in 2019 were 18 percent lower than the annual average since 2011.
He will succeed Andrew Horton, CEO of Beazley, who has held the role for two years.
Her appointment is part of a significant investment in the Dublin office.