Benša made his international debut in the junior men's race at the 1995 IAAF World Cross Country Championships, where he placed 77th.
[5] At the 1998 IAAF World Half Marathon Championships, he ran a lifetime best of 1:02:11, which was good for 20th place in a deep field.
On February 20, 2000, he was entered in the Austin Marathon as a professional pacemaker, but decided in the middle of the race to try finishing and ended up winning.
[8] On December 31, 2000, in below-freezing temperatures and strong gusts, he won a four-mile road race organized by NYRR called the New Year's Eve Midnight Run.
[10] On June 1, 2002, he won the Stillwater Stampede 5-miler in 23:46.47, breaking the course record previously held by 2:10-marathoner Nelson Ndereva Njeru.