At the time of his sacking he was on a written warning after colleagues complained about his conduct.
One objected to him referring to workmates as "fat-arsed bitches" and another complained of verbal harassment.
The authority heard two other meat inspectors said Mr Thomas was "manipulative, overbearing, patronising and intimidating" and the work environment was much better after he was sacked.
Mr Cheyne said there was "animosity towards Mr Thomas from nearly half of his work colleagues" and "vehement" opposition to him returning to work.
AsureQuality interim chief executive Kelvin Smith told APNZ the company was happy they had not been ordered to reinstate Mr Thomas but would not comment further.
Mr Thomas could not be reached for comment.