Tillie earned a Bachelor of Science in Movement and Education in 1984, as well as a Diploma of Physiotherapy and Kinesiology in 1991, from the University of Nice.

Tillie is a father of three: Kevin, Kim, and Killian, as well as the husband to the former Dutch national team captain, Caroline Keulen.

Tillie was part of the France men's national volleyball team between 1982 and 1995, playing in total 407 international matches.

In 2005, Tillie assumed more responsibility serving as the head coach for the Czech Republic men's national volleyball team.

He remained with AS Cannes until he accepted the position as the head coach of the France men's national volleyball team in July 2012.