SIPTU has said unionised staff at the Football Association of Ireland are in fear of job losses within the organisation.
SIPTU Sport Sector Organiser, Denis Hynes, said he has a "major concern" for the job security of the FAI's employees.
He said "staff are seeking urgent clarification on their future employment".
It follows the publication of accounts yesterday showing that the FAI's net liabilities are €55m, and that it is in a process of refinancing with its banks.
The association also owes almost €3m to the Revenue Commissioners and is under investigation by the Office of the Director of Corporate Enforcement.
Mr Hynes told RTÉ News "the mistakes of a few are putting the jobs at risk of many, and football is at risk".
"We are seeking a meeting with the management of the FAI, Minister Ross and all the relevant bodies to protect jobs and Irish football into the future," he added.
Former player Alan Cawley has described yesterday as "the darkest day in the history of the FAI".
The RTÉ analyst said there has been a lot of "anger and disgust" since the association's accounts were laid bare.
He also said there is a general feeling that "people have been let down" by the football governing body.
"That goes from volunteers, staff members, players and anybody who is involved in the game, from grassroots-level right up to the very highest level," he added.
Late last month, Sport Ireland referred the report of an independent forensic audit of the FAI's finances to An Garda Síochána.
Soccer analyst Eamon Dunphy said the developments are a severe blow to the thousands of people involved in coaching on a voluntary basis.
Speaking on RTÉ's Marian Finucane, Mr Dunphy said: "They're all volunteers.They do it because they love the game, they love their community and they provide for young people and imagine what the morale must be like ... which is why we have to get to the bottom of this."
Officials at local clubs have also expressed concern.
Chairman of Knocknacarra FC Gerry Carroll said the club relies on the FAI to provide a professional development plan for the Galway club which has 900 members - 95% of whom are under 18 years of age.
Mr Carroll said that if the funding is not there to provide a coaching structure for the club, it will stall the standard of coaching.
"They all aspire to be players for Ireland and they want to play for the big clubs in England and the Premiership clubs.
"Under our professional development plan, we have a coaching structure and have 100 coaches in that structure - generally volunteers.
"The FAI provide a professional development plan for us and we try to follow that plan. If the funding isn't there to provide that plan, it will stall our coaching here or the standard of coaching here.
"I hope that it won't impact on us but I expect that it will."