Lovell will leave the company on 30 June. His opposite number at Aviva's insurance business Norwich Union, Ben Welsh, takes over comms responsibility for both the RAC and NU brands.
The RAC's comms team remains at 13 staff, plus 12 at its Lex fleet-hire business. Rebecca Bell, Rachel Knowles and Ann Skey are still in charge of the RAC's PR, internal comms and PA respectively.
Lovell took the RAC role in January 2004, having previously been director of corporate communications at T-Mobile UK. He said he had 'started talks' over his next move.
RAC chief executive Andy Harrison is also leaving the company, it has been confirmed.