A playing group featuring several new faces will play their first match since May's Guinness PRO14 Final at Celtic Park.
Johnny Matthews will make his first appearance in a Glasgow Warriors shirt in the front-row, with the Liverpudlian packing down between Oli Kebble - fresh from his recent contract extension - and Adam Nicol.
A mix of youth, experience and new arrivals make up the Glasgow replacements, as Rennie and his coaching staff run the rule over their squad ahead of the new season, which kicks off three weeks today.
Scotland 7s players Alec Coombes, Max McFarland and Kyle Rowe are equally poised to make an impact from the bench, alongside Fosroc Scottish Rugby Academy Stage 3 Players Cameron Henderson, Marshall Sykes, Ollie Smith and Ross Thompson.
Glasgow Warriors Head Coach, Dave Rennie, said: "The boys are keen to get out there and play.
"We've had a lot of guys involved with Rugby World Cup preparation, so we've had a lot of boys come in and train with us. They've worked really hard and slotted in nicely, so they'll get their chance tomorrow.
"Ulster will be in the same boat us, I reckon. They'll have a few faces away and will be trying a few players out with a few young men, so it's a chance for both sides to have a look at those guys under a bit of pressure."
15 Glenn Bryce
Pat O'Toole, Alex Allan, D'arcy Rae, George Thornton, Robert Harley, Lars Morrice, Cameron Henderson, Marshall Sykes, Chris Fusaro, Nick Frisby, Jamie Dobie, Ross Thompson, Patrick Kelly, Alec Coombes, Kyle Rowe, Max McFarland, Ollie Smith.