Aegon UK's chief risk officer Charles Garthwaite has become the latest executive departure at the recovering life and pensions group.

Mr Garthwaite, the former risk and compliance director for Resolution who took up the role in 2010, is leaving "to pursue other interests".

He will be replaced by Aegon's chief actuary Jim Ewing, who joined in 2011 from Lloyds Banking Group where he was a director in the insurance division.

Mr Garthwaite's exit follows that of sales director Paul McMahon who quit last year after barely 12 months to become UK chief executive at FNZ, and the sudden departures this year of distribution director Patrick Gale in January, investment chief Andrew Fleming in March, and Origen chief executive Mike Kirsch in September.

Mr Garthwaite is not leaving until the end of the year.

Chief executive Adrian Grace said: "I am very sorry to see Charles leave Aegon.

"He has been a key player in turning our organisation around, not just in the establishment of a strong and influential risk function, but also with his contributions and energy at board level."

After leaving Resolution on its takeover by Pearl in 2008, Mr Garthwaite founded Assent Financial, intended as a buyout and restructuring vehicle to target the mutual sector.

His future plans are still under wraps.

Mr Grace said of Aegon's new risk officer: "Jim has extensive leadership experience and has the clear expertise to deliver on new demands within our business."

He added: "With Charles's help we have seen a dynamic transformation at Aegon UK."

Aegon shed 600 jobs in Edinburgh three years ago but is now creating 100 new roles on the back of its fast-growing new retirement choices platform.