Devenny came through the ranks at Kilmarnock before moving to Airdrieonians on a permanent basis in the summer of 2022.
He made 54 appearances for the Diamonds over two seasons, notching five goals and seven assists. During their 2022/23 promotion-winning campaign, Devenny played 41 times, scoring in the penalty shootout of the League One play-off final against Hamilton Academical.
Upon signing, Devenny said: “I’m absolutely delighted to be here at Crystal Palace. It’s a big step up, but I can't wait to get started. The facilities are amazing and I’m really looking forward to it.”
Academy Director Gary Issott added: “Justin was someone we were made aware of last season after he established himself in the promotion-winning team at Airdrieonians.
“He has played first-team football from an early age, and joins our exciting Under-21s squad to provide competition in the midfield area.”
Devenny scored his first goal for the club in a 6-2 win against Middlesbrough U21s in the Premier League Cup in September 2023. He also notched two assists that evening.
The midfielder earned a call up to the Northern Ireland U21s side for the first time in October 2023 and made his debut against Serbia U21s.
In March 2024, Devenny's performances at U21s level earned him a place in the first-team's mid-season friendly squad to face Bodø/Glimt. He was subsequently called up to the Northern Ireland U21s squad once more in March and managed to assist fellow Palace teammate Craig Farquhar's winning goal from a corner against Serbia.
In April 2024, Devenny netted the fourth and final goal, in a 4-2 win over Everton U21s, to seal Palace's place in the Premier League International Cup final. He followed this up at the end of the month by scoring a sumptuous free-kick against Middlesbrough U21s to help Palace on their way to the Premier League 2 play-offs.
He finished his first season in red and blue with 31 appearances for the U21s, with six goals and four assists. He also helped the side to victory in the Premier League International Cup final against PSV at Selhurst Park.
September 2024 saw Devenny involved in the Premier League for the very first time, as he was named on in the matchday squad against Chelsea in the Premier League.
In his first 10 appearances for the U21s in 24/25, Devenny netted twice and registered an assist while captaining the side.
On Saturday, 9th November 2024, Justin Devenny made his Premier League debut at Selhurst Park - starting against Fulham. A strong performance on his debut also earned him his first call-up to the Northern Ireland senior squad a few days later.
He made his senior debut for Northern Ireland as a late substitute against Luxembourg in the UEFA Nations League.
On Saturday, 23rd November 2024, Devenny netted his first goal for the first-team in his second ever start - scoring on the counter against Aston Villa at Villa Park.
Devenny made nine further appearances off the bench in all competitions since his goal against Villa, earning himself a new contract in January 2025. He scored his second goal for the club in Palace's 2-0 win against Doncaster in the FA Cup fourth round in February 2025.
In March 2025, Devenny was called up to the Northern Ireland senior squad for the second time, where he featured in friendlies against Switzerland and Sweden.
The midfielder concluded his breakthrough season in SE25 with 28 appearances across all competitions for the first-team, with two goals and one assist, as well as an FA Cup Winners medal.
Devenny began the 2025/26 season with a bang, helping Palace lift the Community Shield by scoring the decisive penalty in the shootout victory over Liverpool. He later repeated that composure from 12 yards in the Carabao Cup fourth-round win against Millwall, continuing to show his reliability in high-pressure moments.
The midfielder also enjoyed key milestones on the international stage and in Europe, scoring his first senior goal for Northern Ireland against Luxembourg in September before opening his European account in a 2-2 draw with KuPS Kuopio at Selhurst Park, also providing an assist.
Devenny made 32 appearances across the campaign, scoring twice and registering one assist. His final outing of 25/26 came on the international stage, where he played the full 90 minutes as Northern Ireland suffered a 3-1 defeat to 2018 World Cup winners France at the Stade Pierre-Mauroy.
NINorthern Ireland
