She was the gold medallist in the 400 m hurdles at the 2011 Pan American Games, at which she also won a 4×400 metres relay bronze medal in a Colombian record time.

She has won numerous hurdles medals at the South American Championships in Athletics and has reached the podium at the competition in seven different years (from 1999 to 2011, with the exception of 2007).

She showed an aptitude for hurdling at an inter-school meeting in 1991, but remained more interested in the ball game and represented her municipality in the sport.

Having come from a poor family, her mother encouraged her to focus on her science studies rather than sport, but Oliveros combined the two as a student-athlete and she developed into a regional-class hurdler.

[2][3] At the 1999 South American Championships in Athletics n the Colombian capital of Bogotá she won bronze medals in both the hurdles events.

[7] After a low-key 2007, the 32-year-old Oliveros ran her fastest 400 m hurdles time in almost five years to claim the silver medal 2008 CAC Championships in Cali, Colombia with a run of 57.44 seconds.