External relations director Sue Slipman is to depart in mid-October, around the same time as the cost-cutting review is scheduled to end.
Her departure comes as the lottery body continues its £72m rebrand, which corporate communications head Andrew Jones said is 'barely half-way through'.
'I am not saying aspects of the programme so far have not disappointed, but the organisation is keen to continue the relaunch,' he said.
Jones refused to comment on whether the cuts would lead to any redundancies from the 25-strong comms team, which is currently split between offices in London and Watford.
He also refused to confirm whether Slipman will be replaced - or if the comms department will retain a place on the board.
Commenting on Slipman's departure Jones said: 'Sue came in to do a job - to create a focus around corporate and CSR. She feels she's achieved that goal.'
Jones added that the cost-cutting review would not impact on its two retained agencies, AS Biss & Co and Harrison Cowley.
Reporting to Slipman are government relations head Sarah Kennedy, consumer PR head Jacquie Wilson and regulatory affairs head Colin Simms.
Slipman joined Camelot in 1998 as director of social responsibility.
She gained a boardroom position in January 2001.
Jones dismissed reports that Slipman and CEO Dianne Thomson did not see eye to eye as 'completely untrue'.
Within the next three months Camelot plans to launch its scratchcard games online.