The Austrian's reputation precedes him: a coach known for nurturing talent and setting his sides up to play on the front foot, he stands as only the third manager ever to have lifted both the Europa League and the Conference League.
That European pedigree was built at Wolfsburg, whom he steered into the Champions League places, and cemented at Eintracht Frankfurt, where he ended a 40-year wait for continental silverware by winning the Europa League in 2021-22, a side that earned admirers across Germany for its intensity and attacking football.
More recently, Glasner made an instant impact in English football at Crystal Palace, winning the FA Cup in 2024-25 in his first full season in the Premier League, followed by the Community Shield, before adding the UEFA Conference League the following season.
Speaking after his appointment was confirmed, Glasner said he had been convinced by the clarity of Forest's ambitions.
"I'm delighted to join Nottingham Forest as head coach. From my very first conversations with the owner and the leadership team, it was evident to me that they have a clear vision for this football club and complete trust and belief in me and my staff to build a strong future together over the long term.
"That trust and shared commitment, together with the potential that I see within the squad, were key factors for me and I am excited about what we can achieve together.
"Nottingham Forest is a club with incredible prestige and history, a two-time European champion with one of the most passionate fan bases in football. Our aim is to build a team that can help take the club to the next level in the years ahead and that our supporters can be proud of.
"My immediate focus is on meeting the players and staff and getting to work as we begin pre-season. I'm excited for the future and will work tirelessly to represent this great club with pride and to bring success on the pitch. I can't wait to get started."
Owner Evangelos Marinakis said the appointment reflected a shared ambition to restore Nottingham Forest among Europe's leading clubs.
"In our discussions with Oliver, it was clear that we share the same vision, the same ambition and the same relentless desire to succeed. He has consistently demonstrated throughout his career that he can build outstanding teams and deliver success against the strongest competition.
"It has always been our goal to establish Nottingham Forest once again among the leading clubs in England and Europe. Our ambition is not simply to compete – our ambition is to win, to challenge for major honours and to create a football club that our supporters can be proud of for many years to come.
"Oliver is a winner. He has earned success through his leadership, his personality and the style of football his teams play. We believe he is the right person to lead us into this next chapter, and I am delighted to welcome Oliver to the club."