O'Malley partners Brendan Macken at centre in a side which blends youth and experience across the various combinations.
Fionn Carr will line out on the left wing with youngster Adam Byrne named on the other flank, while John Cooney links up at half back with Noel Reid who is the province's top scorer in this year's competition with 31 points to date.
Jack McGrath leads the team and is named again in an abrasive pack, with flanker Ryan continuing in a strong back row unit with Rhys Ruddock and Leo Auva'a, who were both try scorers in last Saturday's 16-12 win away to Jersey.
Leinster 'A' currently lie level on 10 points with Pontypridd at the top of Pool 5. The Welsh club host Leeds Carnegie on Saturday.
* There is free entry to Sunday's game for Leinster Season Ticket holders upon presentation of this year's membership card.
LEINSTER 'A' (v Jersey): Cathal Marsh; Adam Byrne, Eoin O'Malley, Brendan Macken, Fionn Carr; Noel Reid, John Cooney; Jack McGrath (capt), Aaron Dundon, Jamie Hagan, Ben Marshall, Tom Denton, Rhys Ruddock, Dominic Ryan, Leo Auva'a.
Replacements: Tom Sexton, Jack O'Connell, Tadhg Beirne, Conor Gilsenan, Luke McGrath, Jordan Coghlan, Steve Crosbie.