slippens represented the netherlands at three different summer olympics. he made his olympic debut at the 1996 summer olympics in atlanta where he participated in the four kilometer team pursuit alongside jarich bakker, richard rozendaal and peter schep. the team finished in twelfth position. four years later at the 2000 summer olympics in sydney, he took part in the same event, but with different riders. bakker and rozendaal were replaced by jens mouris, john den braber, and wilco zuijderwijk, while schep and slippens stayed. although the team consisted of five riders, only four were allowed on the track at the same time. they qualified for the quarter finals, where they lost to the ukrainian team, resulting in a seventh place overall.