Stephen Bamrick and his team were escorted off the Dunfermline site where they were installing fibre-optic cabling.
The £128k contract was cancelled after the worker ignored a ban on smoking or vaping near the flammable cables.
Raging Bamrick reacted by attacking his employee with a tool-box.
Bamrick, 52, of Easterton Drive, Caldercruix, appeared from custody at Dunfermline Sheriff Court.
A warrant had been granted after he failed to turn up for a previous court hearing and he was arrested at the airport when returning from a New Year holiday.
He admitted that on February 15, 2023 at Amazon, Amazon Way, Dunfermline, he assaulted Francesco Delgraco, by striking him on the body with a toolbox causing him to fall to the ground.
Depute fiscal Amy Robertson said Bamrick owns a company which won a contract installing cabling at Amazon’s huge warehouse in Dunfermline.
Bamrick was working at the site with three employees when one of his workers was caught vaping around highly flammable cables.
He was seen by Amazon security staff and all the workers were told to leave the site.
At around 11am in the site car park, Bamrick encountered Mr Delgraco, who was the one who had been caught smoking the vape, the court was told.
The depute went on, “He was very angry with him as the contract had been terminated.
“The accused picked up a toolbox and struck on him the body with it making him fall backwards on the ground. He then hit him once more when he was on the ground.”
The incident was reported to police by security staff at Amazon after the assault was caught on their CCTV.
Defence solicitor Stephen Morrison said his client’s firm installs fibre-optic cabling and the Amazon contract, which was lost, should have brought in £128,000 over four to five months.
“He tells me that vaping in the control room area is an absolute no-no, as he describes it, as cables are left exposed during the installation process.
“This worker had been found vaping by security staff and marched off the site. Mr Bamrick was contacted elsewhere on the site with his other workers. They too were marched off the site, never to return,” added Mr Morrison.
“As well as losing the contract he also lost the cost of the cabling that had already been installed.
“He was extremely angry when he exited the site and then saw the worker who had been vaping. He was extremely flippant about it all saying, ‘It’s only a job’.”
Sheriff Susan Duff appeared to be sympathetic to Bamrick’s financial loss and admonished him.
She told him: “What is clear is that this incident had an enormous cost to your company.
“It was stupidity and a lack of thought from your employee, now no doubt a former employee.
“It is totally understandable that you were furious at him and his actions. For that reason, I’m admonishing you.”