John O'Shea has been appointed as Assistant Head Coach for the Republic of Ireland under new manager Heimir Hallgrímsson, following his interim role earlier this year. O'Shea's return comes as Hallgrímsson aims to establish continuity within the coaching staff ahead of the UEFA Nations League, with the first matches scheduled against England and Greece in September. Paddy McCarthy will also remain as Assistant Coach while continuing his duties at Crystal Palace. The coaching team will include Gudmundur Hreidarsson as the new goalkeeping coach, who has previously collaborated with Hallgrímsson in various roles. Head of Athletic Performance Damien Doyle will continue in his position, and a performance analyst will be appointed soon. Hallgrímsson expressed his satisfaction in securing O'Shea and McCarthy's involvement, emphasizing their alignment in vision for the team's future.