Chris Lawson, the station’s brand director, is to leave on 18 December to pursue a new digital venture.
A spokeswoman for the station says he will not be replaced and his duties will be shared.
Lawson’s digital responsibilities will be taken on by chief operating officer Clive Dickens while marketing and communication will now be overseen by head of marketing Clare Baker and head of communications Cat Macdonald respectively.
Lawson has been with the station since it launched last September following its rebrand from Virgin Radio.
The station saw got off to a difficult start seeing its national reach across all platforms drop 23.6% in its first few months but has since steadied, posting a 7.1% increase in hours in the last quarterly Rajar report.
Absolute has positioned itself as a music and entertainment brand with its digital services at the forefront. More than half of its national listeners tune in via a digital platform compared with the industry average of 21.1%.