The 23 year old Peterborough United goalkeeper O'Malley has started nine games this season for "Posh" and is one of four players to receive their first call ups alongside Graham Burke of Shamrock Rovers, Millwall midfielder Shaun Williams, and Preston North End forward Callum Robinson.
Previously with St Patrick's Athletic, Conor was a part of a talented and successful Maynooth University team before making the move across the water.
According to the FAI website some players "will drop out of the squad after the Celtic game on Sunday, May 20 in Celtic Park, while others will only report into camp ahead of the trip to Paris to take on France on Monday, May 28 in Stade de France and the home game against the United States on June 2."
Republic of Ireland Men's National Team - Provisional Squad
Goalkeepers: Darren Randolph (Middlesbrough), Keiren Westwood (Sheffield Wednesday), Colin Doyle (Bradford City), Kieran O'Hara (Manchester United), Ian Lawlor (Doncaster Rovers), Conor O'Malley (Peterborough United)
Defenders: Seamus Coleman (Everton), Cyrus Christie (Fulham), Matt Doherty (Wolverhampton Wanderers), Alex Pearce, Richard Keogh (Derby County), John Egan (Brentford), Shane Duffy (Brighton & Hove Albion), Ciaran Clark (Newcastle United), Declan Rice (West Ham United), Kevin Long (Burnley), John O'Shea (Sunderland), Darragh Lenihan, Derrick Williams (Blackburn Rovers), Enda Stevens (Sheffield United), Greg Cunningham (Preston North End)
Midfielders: Alan Judge (Brentford), Conor Hourihane, Glenn Whelan (Aston Villa), Jeff Hendrick (Burnley), Harry Arter (Bournemouth), Eunan O'Kane (Leeds United), David Meyler (Hull City), Shaun Williams (Millwall), Alan Browne, Daryl Horgan (Preston North End), Callum O'Dowda (Bristol City), James McClean (West Bromwich Albion),
Forwards: Jonathan Walters (Burnley), Shane Long (Southampton), Scott Hogan (Aston Villa), Aiden O'Brien (Millwall), Sean Maguire, Callum Robinson (Preston North End), Graham Burke (Shamrock Rovers)