JB Gill told Metro that his boyband colleague would be perfect for the reality talent show they finished runners-up on in 2008.
"I think they should make Oritsé an X Factor judge," Gill said.
"Absolutely, because Oritsé's a founding member of JLS. He'd be fantastic."
Last year's X Factor judging lineup was made up by Gary Barlow, Louis Walsh, Kelly Rowland and Tulisa Contostavlos.
JLS were runners-up to Alexandra Burke on the fifth series of the show. They have since released three platinum albums, JLS, Outta This World and Jukebox.
The group recorded last year's X Factor charity single alongside other former finalists One Direction. The two bands have pledged to return to the studio again together in future.
> JLS record '90s new jack swing' for fourth album
Watch the JLS 'Proud' music video below: