Broadcaster Chris Smith has been let go from his on-air roles with both Sky News and Nine Radio’s 2GB.

The contract terminations come amid allegations of serious misconduct at the Sky News Christmas party, as first reported by The Sydney Morning Herald.

In the wake of the allegations, Smith apologised, citing alcoholism and mental health struggles as key drivers of his actions.

“I am beyond gutted and devastated to know I have upset my colleagues after our Christmas party,” he said.

“I apologise profusely to the women I upset. That’s not the man I am at work ever, as they will all attest. They have been so supportive to me and do not deserve such drunken treatment.”

It is not the first time Smith’s behaviour at professional gatherings has come under fire, and Sky News Australia CEO Paul Whittaker said Smith’s conduct was in breach of company policy.

“Following an investigation into allegations of serious misconduct, we have today advised Chris Smith that his contract with Sky News Australia has been terminated as a result of inappropriate behaviour that is in breach of his contract and company policy,” Whittaker said.

“We continue to offer support to affected staff members whose welfare remains our primary concern.”

Smith also lost his role at 2GB.

Tom Malone, Nine Radio’s managing director of radio, said: “Chris’ behaviour represents a serious breach of his contract, and is not aligned with the values of 2GB.”