Wasps prop Charlie Beech and second row Marty Veale have both signed two-year contracts with the club.
Beech, 21, graduated from the Wasps academy after joining from Northampton in 2007.
New Zealander Veale, 31, arrived in February after previously playing club rugby in his homeland and Japan.
"As our squad continues to take shape for 2009/10, I am pleased these two players have shown their commitment," said director of rugby Ian McGeechan.
Meanwhile, scrum half Eoin Reddan will join Leinster at the start of the 2009/10 season.