Marco Villiger, the man who was the key link between FIFA and US anti-corruption investigators, has left the organisation, football’s world governing body said on Monday.
He was one of the few senior members of previous FIFA president Sepp Blatter’s administration who kept his position under his successor Gianni Infantino.
Villiger was FIFA’s Deputy Secretary General and Chief Legal and Integrity Officer.
He said in a statement released by FIFA: “I had the privilege to be part of FIFA in different roles with different responsibilities.
“After accomplishing a successful FIFA World Cup in Russia, the time for me has come to turn the page to a new chapter, seeking for new challenges.”
FIFA Secretary General Fatma Samoura said Swiss Villiger had been a “pillar of the organisation”.
He came to the fore at FIFA following the 2015 FBI raid in Zurich which saw seven officials arrested on corruption charges.
With Blatter facing a separate Swiss investigation, Villiger, then head of legal affairs, worked closely with the US law firm Quinn Emanuel Urquhart & Sullivan.
The firm conducted an internal investigation of FIFA and helped in relations with the US Department of Justice.
Blatter, who led FIFA for 17 years, has always denied any wrongdoing.
Praising Villiger, Samoura added: “I congratulate him wholeheartedly on his great career within FIFA, in which he has consistently demonstrated his expertise and professionalism, as well as his dedication to this great organisation.
“His competence earned him the trust and respect of internal and external stakeholders. I wish Marco all the best in his future endeavours.”
Since Infantino was elected FIFA president, senior officials from the organisation have moved on with the Swiss keen to bring in his own staff.
More than 40 entities and individuals have been charged by US prosecutors in connection with the FIFA investigation.
The probe has resulted in more than two dozen guilty pleas and one trial of three former football officials, two of whom were found guilty by a jury.