Relegated Longford Town have announced the departure of manager Daire Doyle "by mutual consent" with John Martin taking charge for their three remaining league games.
Doyle guided Longford to promotion to the Premier Division in his first full season in charge, beating his former side Shelbourne in a play-off.
However, they struggled to adjust to life back in the top flight after a four-year absence and endured a 26-game winless run, which cut them adrift at the foot of the table.
Longford's relegation was confirmed after defeat at Drogheda last month and Doyle departed following a meeting with the club on Tuesday.
Longford Town Football Club announces the departure by mutual consent of Manager Daire Doyle.— Longford Town FC (@LongfordTownFC) November 2, 2021
The club thanks Daire for his efforts over these past seasons.
John Martin has been appointed acting Manager for the remainder of the 2021 SSE Airtricity League season. pic.twitter.com/9eLRmrRPDR
Doyle tweeted: "After meeting with our club today, we couldn't agree on a way forward so we decided it would be best to part ways.
"I've loved my time @LongfordTownFC, a fantastic club with great people & supporters. Thank you for my time as manager. I can't wait for the next opportunity and challenge.
"I want to wish everyone at the club the very best for the future and to thank all of those who have supported and helped me along the way - too many to mention in a tweet.
"I hope to see Longford Town back at the top table very soon."
Doyle, who spent two seasons with Longford as a player, rejoined the club as assistant manager in 2017.
He was placed in interim charge following Neale Fenn's departure in August 2019 and two months later was given the role on a permanent basis.
Longford face Dundalk at Oriel Park on Friday before wrapping up a disappointing season with games against Waterford and Finn Harps.
Doyle's final game in charge was against Sligo Rovers on Monday, where Longford conceded an injury-time winner.
Afterwards he spoke to RTÉ Sport about his appetite to lead Longford back into the Premier Division.
"I've a huge hunger to bring this club back to this level," said Doyle. "What we’ve experienced this year will stand to our group hugely.
"A lot of our young players have gained experience at this level. You see the intensity these players can play at and I feel, if we can keep the core of this group together, our club can get in a position next season to get promoted again.
"If we’re in a better position with these players going forward, I feel we can definitely be more competitive with a more experienced group."