Up front, Callum Black starts at loosehead prop with Tom Court, who was named in Ireland's GUINNESS Series squad earlier this week, moving to the bench.
Mike McComish, man-of-the-match for the Ulster Ravens against Jersey last Friday night, is on the bench in place of Iain Henderson who will be out for up to six weeks with a toe injury.
"It is a position that I really enjoy playing in. I was full-back for the Ireland Under-20s in the Six Nations and the Junior World Championship, so I am very confident there and I am looking forward to tomorrow night's game."
ULSTER (v Cardiff Blues): Stuart Olding; Andrew Trimble, Jared Payne, Luke Marshall, Tommy Bowe; Paddy Jackson, Ruan Pienaar; Callum Black, Rory Best, Declan Fitzpatrick, Johann Muller (capt), Dan Tuohy, Robbie Diack, Chris Henry, Roger Wilson.
Replacements: Rob Herring, Tom Court, John Afoa, Lewis Stevenson, Mike McComish, Paul Marshall, Darren Cave, Michael Allen.