 Kọ itẹsiwaju fun paragirafi yii - Heunis dije gẹgẹbi elere idaraya ọdọ kan o si gba ami ẹyẹ idẹ ni 2007 African Junior Athletics Championships : ó ṣe tán. O je oludije semi-finalist ni 2008 World Junior Championships in Athletics o si tun se bi apa kan ninu egbe 4 × 100 metres relay. O gba isinmi lati inu ere idaraya fun ọdun mẹrin ati tun farahan ni awọn ipo agbalagba fun 2012 African Championships in Athletics, nibi ti o ti wa ni keje ni ipari. 