In today’s match against the St George Illawarra Dragons, the 24-year-old ran at centre.
Curtis Scott and Young Tonumaipea, who are nursing injuries, opened the door for Olam.
He has been on the verge of debut since late last season, repeatedly being named the 18th man, or first emergency.
Coach Storm Chris Bellamy had kept Olam on standby early in the week when both Scott and starting winger Suliasi Vunivalu were in doubt.
Olam has been with the team since November 2016.