EE boss Olaf Swantee will step down following the mobile network's soon-to-be completed £12.5bn merger with BT.
Swantee, chief executive since 2011, will be succeeded by Marc Allera, currently chief commercial officer at EE.
“As we approach the imminent completion of the deal with BT and the start of an exciting new chapter for EE, I’ve taken the enormously difficult decision to step down from my role as CEO, and pursue new opportunities," said Swantee.
"I am immensely proud of the past four and a half years, creating, launching and growing EE to the exciting business it is today. It has been a period of great success, and I’d like to thank all of our employees for the incredibly hard work and support they have shown to me, as well as the business, to help achieve this.
To leave EE is probably the hardest decision of my career, but I feel the time is right for me to handover for the next exciting chapter of EE’s incredible journey. I wish Marc all the success for the future.”
The deal was given a provisional thumbs up by the competition authority in October with completion following a final approval expected in February.