In 1999, Andam represented Ghana in the 200 metres at the 1999 World Championships in Seville, Spain. He finished sixth in his preliminary heat (21.31 seconds) and failed to advance to the quarter-finals. The following year at the 2000 African Championships in Algiers, Andam earned a bronze medal in the 100 metres (10.33 seconds) as well as a gold medal on Ghana's 4 × 100 relay team (39.90 seconds). At the 2000 Summer Olympics in Sydney, he represented Ghana in the 4 X 100; however, his team failed to finish in their qualifying heat. Andam also competed in the 100 metres at the 2001 World Championships in Edmonton, Canada. In his preliminary heat, he finished third in 10.40 to qualify for the quarter-finals. In the quarter finals, Andam narrowly missed qualifying for the semi-finals with a fourth-place finish in 10.26.