Half-backs Paul Marshall and Niall O'Connor have also been included after missing last weekend's bonus point victory over Zebre.
The 27-year-old winger Neil Walsh, a late replacement in that game, may get another opportunity this Friday against the Scottish outfit.
Ulster remains top of the PRO12 table following the 26-3 home win over the Italians. Mark Anscombe's men have a seven-point advantage over the second-placed Warriors going into round 16.
ULSTER Squad (v Glasgow Warriors) - Backs (11): Ruan Pienaar, Paul Marshall, Michael Heaney, Niall O'Connor, Stuart Olding, Paddy Wallace, Michael Allen, Andrew Trimble, Chris Cochrane, Neil Walsh, Ricky Andrew.
Forwards (14): Rob Herring, Nigel Brady, Ricky Lutton, Callum Black, Andrew Warwick, John Afoa, Neil McComb, Alan O'Connor, James Simpson, Dan Tuohy, Mike McComish, Conor Joyce, Ali Birch, Robbie Diack.