The 48-year-old South African was in charge of the senior squad from 2002 to 2007, before stepping down after the World Cup campaign, handing over the reins to Phil Simmons.
Chairman of the Cricket Committee, Joe Doherty said: “We are delighted to renew our association with Adrian on a formal basis. The new demands of the sport as they affect Cricket Ireland mean that we are now living in a High Performance world and it is in this context that Adrian will operate.
Birrell admitted: “I’m delighted to be doing some consultancy work with Ireland on a regular basis. I’ve come a long way with most of the players I’ve been dealing with. I’ve been to U19 World Cups with them as well as knowing some of them from previous senior squads. I’m looking forward to renewing those relationships, and making a contribution to help Irish cricket progress and continue being successful. The recent results have been superb, and have confirmed their standing as the leading Associate country.”
Meanwhile the 13 man squad for Sunday’s Friends Provident fixture with Worcestershire at Stormont has been named. William Porterfield captains the team, fresh from a successful campaign in South Africa, where Ireland captured the World Cup Qualifier Trophy. Nine of that squad are available, and they are joined by James Hall, Paul Stirling, Reinhardt Strydom and wicket-keeper Fintan McAllister. Eoin Morgan, Gary Wilson and Boyd Rankin are required by their respective counties, while Trent Johnston (hamstring), Andre Botha (ankle), and Alex Cusack (ankle), miss out with injury.
IRELAND Squad: W Porterfield – Captain (Gloucestershire), P Connell (North Down), P Eaglestone (Strabane), J Hall (Waringstown), F McAllister (Malahide), wicket-keeper K McCallan (Waringstown), J Mooney (North County), K O’Brien (Railway Union), A Poynter (Clontarf), P Stirling (Carrickfergus), R Strydom (YMCA), R West (Civil Service North), A White (Instonians),.