George Berrie has stood down from his position as intermediary business director of Norwich Union's General Insurance (NUGI) division after just nine months in the job.
NU said the move was for "personal reasons".
Berrie will return to his old role of regional business director (North) and has been replaced by John Kitson, formerly consumer director.
David McMillan, who was partnerships director, steps into Kitson's role, while McMillan's previous post is to be filled by Angela Seymour-Jackson, formerly director of banks.
Mark Hodges, NUGI managing director, said: "We are very fortunate to have an excellent team of experienced senior managers with the skills and flexibility to fill these key posts."
Meanwhile, NU confirmed there were likely to be some redundancies following a re-structure of the insurer's support functions including IT, properties and facilities management.
The re-structure is designed to eliminate duplication following the merger of NU with RAC in May 2005.
