In 1986, De Neef began his career in France with
US Créteil. De Neef spent four seasons at the club, before moving to
CS Fontainebleau in 1990. In 1992, De Neef signed for
Ligue 2 club
Sedan. At Sedan, De Neef made over 75 appearances in all competitions. In 1992, De Neef joined
Ligue 1 club
Nice. In his final season at the club, De Neef won the
1996–97 Coupe de France, scoring a penalty in the penalty shout-out in the
final against
EA Guingamp. In 1997, De Neef signed for
Le Havre, making 154 league appearances, scoring four times, in five seasons at the club. After leaving Le Havre, De Neef played for
Olympique Alès,
Tours and
Rapid Menton in successive seasons. In November 2004, De Neef played three times for
French Guiana in qualification matches for the
2005 CONCACAF Gold Cup. ==Managerial career==