Healy took early career stage wins in both the
Tour de l'Avenir and
Baby Giro. He came to international prominence in 2023 after a strong spring classics season with results including winning the
2023 GP Industria & Artigianato di Larciano and podium finishes in the
Amstel Gold Race, between
Tadej Pogačar and
Tom Pidcock, and
Brabantse Pijl, and a 4th place finish in the
Liège–Bastogne–Liège. Following his successful classics season, Healy made his
Grand Tour debut in the
2023 Giro d'Italia and, a week later, on 13 May, won his first Grand Tour stage after a solo break of 50 kilometres on
stage 8. The following season, he competed in his first
Tour de France, where he was part of the breakaway on multiple stages, finishing fifth on stage 9 and winning the
combativity award on stage 14. He next competed in the
road race at the
Olympic Games, where he placed 10th. On 10 July 2025, Healy claimed a
first Tour de France stage win of his career on
stage 6. The 24-year-old, racing for US-based team
EF Education-EasyPost, produced an aggressive ride, peeling away with 42.6km left on a solo attack to take victory on the 201.5 km rolling hilly stage six from
Bayeux to
Vire Normandie. The Irishman was originally part of an eight-man breakaway, which opened up a gap with 80km remaining, before Healy made a bold move for glory—winning with 2 minutes and 44 seconds over
Quinn Simmons. On 14 July 2025, a third-place finish in stage 10 of the Tour de France secured the yellow jersey for Healy, making him the first Irishman to wear yellow since
Stephen Roche in
1987. Healy became the fourth Irishman to wear the
yellow jersey following Roche,
Sean Kelly in
1983, and
Shay Elliott in
1963. Healy lost the yellow jersey on Stage 12, finishing thirteen minutes behind stage winner
Tadej Pogačar and falling to eleventh in the General Classification. He climbed back up to ninth position on Stage 14, the position in which he eventually finished the race. On 28 September 2025, Healy won a bronze medal by finishing third in the
2025 UCI Road World Championships road race. It was Ireland's first medal in the
event since
Seán Kelly won the bronze medal in
1989. ==Major results==