In 1999, he went to Minas Tênis Clube, where he went to defend the CR Vasco da Gama until 2002, when he returned to Joinville.

[4][clarification needed] At the 2002 FINA World Swimming Championships (25 m) in Moscow, Fischer turned in his best performance in an international tournament, getting the bronze medal in the 50-metre breaststroke.

[17] At the 2003 Pan American Games in Santo Domingo, Fischer won the silver medal in the 4×100-metre medley and bronze in the 100-metre breaststroke.

[19][20] In 2003, Fischer broke the South American Olympic pool record in the 50-metre breaststroke with a time of 28.21 seconds.

[22] At the 2004 FINA World Swimming Championships (25 m) in Indianapolis, Fischer was close to winning a medal on three occasions.

[30] At the 2008 FINA World Swimming Championships (25 m) in Manchester, Fischer made the 50-metre breaststroke semifinal, but was disqualified.