She represented her native country at the 2004 Summer Olympics in Athens, Greece, and 2008 Summer Olympics in Beijing, China, with an Olympic final in Athens in the 4×200-metre freestyle in the curriculum. At this final, broke the South American record with a time of 8:05.29, along with Joanna Maranhão, Mariana Brochado and Paula Baracho. She also came in 19th place in 400-metre freestyle in Athens 2004. At Beijing 2008, finished 13th in the 4×100-metre freestyle, 21st in the 400-metre freestyle, and 28th in the 200-metre freestyle. At the 1999 Pan American Games in Winnipeg, she won the bronze medal in the 4×200-metre freestyle. She also finished 6th in the 200-metre butterfly, and 9th in the 100-metre butterfly. Monique was in 2000 FINA World Swimming Championships, in Athens, where she finished 25th in the 200-metre freestyle and 9th in the 4×200-metre freestyle. At the 2002 FINA World Swimming Championships, in Moscow, finished 21st in the 200-metre freestyle, 10th in the 400-metre freestyle and 9th in the 4×200-metre freestyle She swam at the 2002 Pan Pacific Swimming Championships, where she finished 5th in the 4×200-metre freestyle, 6th in the 4×100-metre freestyle, 7th in the 400-metre freestyle, and 12th in the 200-metre freestyle. Participating in the 2003 World Aquatics Championships in Barcelona, she got the 21st place in the 200-metre freestyle, 27th in the 400-metre freestyle, and 12th place in the 4×200-metre freestyle. At the 2003 Pan American Games, in Santo Domingo, won the silver medal in the 4×200-metre freestyle, breaking the SouthAmerican record, with a time of 8:10.54, along with Ana Muniz, Mariana Brochado, Paula Baracho She also won two bronze medals in the 400-metre freestyle, and in the 4×100-metre freestyle. At the 2005 World Aquatics Championships, she finished 26th in the 200-metre freestyle, 25th in the 400-metre freestyle and 13th in the 4×200-metre freestyle. She was in the 2006 FINA World Swimming Championships, where she placed 31st in the 200-metre freestyle, was disqualified in the 400-metre freestyle and got 9th place in the 4×200-metre freestyle. At the 2007 Pan American Games, the Rio de Janeiro, Monique won the bronze medal in the 200-metre freestyle and in the 4×200-metre freestyle. Monique also would have won the silver medal in the 4×100-metre freestyle, but this medal was revoked by Rebeca Gusmão's doping. She was South American record holder in the 4×100-metre freestyle, with a time of 3:42.85, on August 9, 2008, along with Tatiana Lemos, Flávia Delaroli and Michelle Lenhardt.
After professional swimming
She ended her career in December 2011. Later, she went to work at COB.
