After his career Lens was appointed by the VVCS (Vereniging Voor Contract Spelers) [Association For Contract Players] and became one of their player’s agents. He would work mostly with the black players, with whom he built up close relationships. The VVCS reasoned that a black agent would sooner gain the trust of the black players. After a few years half way during the 1990s he and colleague Peter Gerards were charged for a possible fraud. It was said they might have been earning money for transfers without the VVCS or the player in question knowing. As a result, both were fired by the VVCS, but as a result of the rumours a lot of the players at the VVCS left as well. The affaire with Gerards and Lens in the main roles made it possible for commercial investors to start their own agencies. This was also due to the Bosman ruling of 1995 that made it easier for players to switch clubs.

Lens left AZ in 1986 and signed a new contract at Fortuna Sittard. In his three years at Fortuna Sittard he became the club’s top goalscorer in the 1986–87 and 1987-88 season. In the 1988-89 season only John Clayton scored more goals. He had a great effort in the matches against AFC Ajax, Feyenoord Rotterdam and PSV Eindhoven who were all beaten at Fortuna’s homeground De Baandert that season.

In his playing career Lens was a tall, but quick forward who was able to play as a right winger or a striker. He made his professional debut at AZ in the 1985-86 season when he featured in a team with players like Kees Kist and Pier Tol. Despite the appearance of these goalscoring players he was the club’s top goalscorer in the season, scoring a total of 17 goals. His efforts came out best in counterattacks as his pace could be used optimal.

Sigi Lens (born 26 October 1963) is a retired Dutch-Surinamese footballer and currently is a sports agent. During his career he served AZ and Fortuna Sittard. He was one of the footballers that survived the Surinam Airways Flight PY764 air crash in Paramaribo on 7 June 1989. His nephew Jeremain Lens is also a professional footballer.