After ending his career as a forward in 1988 he was a coach first with his hometown team SC Riessersee and before joining the German Ice Hockey Association in 1991 first as an assistant to the technical director and national team assistant coach and then working his way up as Sport Director, General Secretary and since 2014 as President. Between 1994 and 1996 he was also the CEO of the newly-founded league DEL. Reindl was also the General Secretary of the Organizing Committees for the 2001 and 2010 IIHF Ice Hockey World Championships in Germany and serves as CEO of the Organizing Committee for the 2017 IIHF Ice Hockey World Championship in Germany and France. He was a member of the German bidding committees for the 2018 and 2022 Olympic Winter Games and in 2015 he was named President of Team Europe for the 2016 World Cup of Hockey by the NHL and NHLPA.
During his time with the German Ice Hockey Association Reindl led the national team as General Manager at 15 IIHF Ice Hockey World Championships, four Olympic Winter Games and twice at the World Cup of Hockey.
Reindl has been involved in IIHF committees since 1998, most recently as the Co-Chairman of the IIHF Competition & Inline Committee and as member of the IIHF Co-Ordination Committee. He was also the Chairman of the IIHF Disciplinary Panel for the Olympic men’s ice hockey tournament in Sochi 2014.
Outside of hockey he worked as a manager in wholesale and foreign trade and a long-term independent contractor.