Construction union Ucatt has been accused of victimising one of its officials after refusing to invite him to its annual office party last year.
Michael Dooley claims that general secretary Alan Ritchie has “singled him out” after he stood against Mr Ritchie in an election for the union leadership in 2009.
At a preliminary tribunal hearing in Croydon, south London, this week, Mr Dooley said: “In June 2009 I was a candidate in the election and after that I say I have been constantly victimised.
“The refusal to invite me to the office party was a petty vindictive act and I feel embarrassed to bring the matter to court however there are several other matters which I am complaining about, such as the union withholding legal assistance from me and other matters.”
The tribunal heard how Mr Dooley was subjected to several inquiries and has now been suspended.
The union denies victimising Mr Dooley, insisting that he was not invited to the party as he was not a member of head office staff, although his office is in the same building.
The tribunal will decide whether the claim will go to a full hearing next year.
A Ucatt spokesman said: “At the hearing, the employment tribunal judge reserved his decision. This will be sent to all parties. Until then it would be inappropriate for anyone to comment.”