De Reuck began competing for South Africa and made her first Olympic appearance at the 1992 Barcelona Games, where she finished ninth in the marathon race. She tried her hand at the half marathon, resulting in a win at the City-Pier-City Loop in 1993 and a fourth-place finish at the 1995 IAAF World Half Marathon Championships. She also won the Honolulu Marathon that year with a time of 2:37:29. In 1996 she won the Lilac Bloomsday Run, the Berlin Marathon, and the Eurocross cross country meeting in Luxembourg. She made her second Olympic appearance in the 10,000 m, taking 13th place at the 1996 Atlanta Olympics.