Tommy-James Isiah Tuala, 25, appeared in the Dunedin District Court last week after he earlier pleaded guilty to causing grievous bodily harm with reckless disregard.
The man argued he should not be convicted of the offence as that may impact future career opportunities, his ability to travel and his mental health.
But his application was declined by Judge Emma Smith, who said the offending was too serious for Tuala to avoid a conviction.
The court heard that early on April 7 last year, the victim purchased food from the Octagon before walking past a car load of people, including the defendant, playing loud music.
He approached Tuala, who was aggressive and directed profane language at the man.
The defendant asked if he wanted to fight, but the victim said he wanted no trouble and was on his way home.
Without warning, Tuala punched the victim in the side of his face causing him to stumble.
He was transported to Dunedin Hospital and underwent facial reconstruction surgery the next day, the court heard.
The victim was diagnosed with a shattered cheekbone, which separated from his skull and needed plates inserted into his face.
Tuala told police the victim was "annoying" and made him angry.
In a statement to the court the victim said the effects of the attack would be with him for life.
He had to take time off work and missed opportunities to advance in his career.
The upset it caused his family was "simply devastating", the court heard.
Counsel Kelly Beazley argued her client was a young man of good character and had tried his best to put things right since the offending.
She highlighted the more than 100 hours’ community work the defendant had done and the letter of remorse he had written to the court.
Ms Beazley argued if Tuala was convicted he would lose the role he had lined up with a local school boarding hostel.
He would also likely lose the potential to work for Police or Corrections, in which he had expressed some interest.
His ability to travel to Samoa, where he spent his childhood, may also be impacted, she said.
Crown prosecutor James Collins did not accept that the defendant’s remorse was genuine and did not believe travel issues would occur if the man was convicted.
He highlighted the profound impact the offending had on the victim, who wanted the defendant convicted.
Judge Smith said the attack was "particularly serious" and had "harrowing" effects on the victim and his family.
She noted the defendant’s attempt to put things right and that he experienced some turmoil in his upbringing.
The judge sentenced Tuala to six months’ community detention to be served in Auckland, and 250 hours’ community work.
She also ordered him to pay reparation of $2500.
