Sally Lake will be appointed as the group finance director of Beazley PLC, effective when Martin Bride steps down in May.
Lake joined Beazley in 2006 and has served as the group actuary since 2014.
Additionally, Angela Crawford-Ingle, non-executive director and chair of the audit and risk committee, will step down from the board at the end of the 2018 accounting year and when the transition to her successor is complete. She will step down after two three-year terms.
The search for Crawford-Ingle's replacement is at an "advanced stage," according to a news release.