[2] Raab played 20 times for the East Germany national team and scored two goals.

[3] Raab was later a manager for Rot-Weiß Erfurt, FC Sachsen Leipzig and assistant coach by Bursaspor and 1.

[4] On 1 June 2010, he replaced René van Eck at his former club Carl Zeiss Jena as head coach.

[6][7] After former Courts Young Lions head coach, Aide Iskandar's resignation, he was named the head coach for the Courts Young Lions in the Singapore League for the rest of the 2015 season.

In January 2017, less than a week after announcing the parting of ways with Akbar Nawas, Tampines Rovers have confirmed Raab as their head coach starting from the 2017 S.League season, signing a three-year contract to take charge of the five-time S.League champions.