Christian Purslow has stepped down from his temporary position as Liverpool's managing director following last week's successful £300million sale of the club to New England Sports Ventures (NESV).
However, Purslow will remain at Anfield as a non-executive director and will also act as a special adviser to the new owners.
NESV chairman Tom Werner said of the news: "We are delighted Christian has accepted our offer to help us and the club, given his great experience and love for Liverpool FC. We will now begin a global search process for a chief executive officer."
Purslow added:"I came to Liverpool to lead the club through a sale process to get the best overall deal including, vitally, the removal of the debt. I am immensely proud of what we have all achieved.
"I now look forward to assisting the owners in any way I can at this exciting time as they drive the club forward to a bright future."
Purslow took up the post in the summer of 2009 when he replaced Rick Parry.