A member of staff at a Carlton Hill club was taken to hospital with face injuries after being attacked at work, police said.
Officers have now released an image of a man they wish to trace after the assault.
The incident happened on Saturday, November 30 just before 1.30am at the Top Spot Club.
The member of staff, in his 50s, was punched in the mouth and then kicked. He suffered a split lip and was taken to hospital for treatment.
Officers have carried out a number of lines of inquiry to locate the person responsible but so far no arrests have been made.
Police have now released an image of a man that could help them further their investigation and are calling on the public’s help to identify him.
PC Tony Mait, who is investigating the incident, said: “No one should have to go to work and face this type of violence.
“The victim was punched and kicked before the group left the venue at speed.
“We have now released an image of a man that could us with our inquiries and are calling on the public’s help.
“Do you know the man in the image? Are you the man in the image? Please get in touch with us as soon as possible.”
Anyone with information can call 101 quoting incident number 0054 of the 30th November 2024 or Crimestoppers anonymously on 0800 555 111.