Toby Williams, 35, had been working for an agricultural engineering business for two months before he walked off the job on February 22 this year.

Williams' supervisor had arrived at the worksite about 6am when he noticed the work ute at the site in Dubbo, when it was meant to be in Cobar.

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The supervisor contacted Williams several times to locate him, however received no answer or reply.

At about 9.58am Williams text the supervisor saying "u are a lying c--- bud! I've took my belongings f--k u [sic]".

The supervisor told Williams he wanted his tools back or he would contact police when Williams again responded saying "police will be informed when I break ya jaw too ya dog".

The victim again asked for the tools back when Williams sent a series of texts suggesting his supervisor should meet him and collect the tools.

"Come get em if ya want them [sic]," one message read.

"Take ya work shirt off and meet me down the soccer ovals behind Coles," another said.

The supervisor stated he was going to be the bigger person and that Williams was just upset and he needed to sort his life out, before Williams told him he will be getting "dirt" on his family.

Williams then began contacting the supervisor's relatives in New Zealand, which caused him to feel intimidated and unsafe.

In Dubbo Local Court on Wednesday Williams pleaded guilty to one count of intimidation.

The court heard the "juvenile responsive text messages" occurred after there was a dispute he was getting paid less than a colleague who had less experience than him.

"He threw the towel in and went home," Williams' defence said.

"The text to his former supervisor, they came from a place of anger, he didn't mean it."

Williams defence lawyer said he had accepted his conduct was "inappropriate" and was now unemployed due to the incident.

Magistrate Gary Wilson convicted and fined Williams $250.