Ben Gillies joined Canterbury in 1991 as a lock forward. He is the brother of Simon Gillies
In 1992, Ben started the season in reserve grade and received the opportunity to play first grade against Brisbane as a hooker when Sean Skelton was relegated. Ben was later relegated for Geordi Peats but was a regular first grade replacement.
In 1993, he was a regular member of the reserve grade team and played in the Preliminary Final against Newcastle as a replacement.
In 1994, Ben returned to first grade when Geordi Peats was relegated until mid-season when relegated for Jason Hetherington.