Safety was "paramount" at Heavy Mechanics, according to the truck driver behind the wheel when a BP petrol tanker came loose and caused a triple fatality.
Investigators did not hold Patrick Daley responsible for the crash at Staghorn Flat on August 7, 2014, instead charging the company with failing to ensure people were not exposed to health and safety risks.
He gave evidence in a trial at Wodonga County Court on Monday, where Heavy Mechanics has pleaded not guilty to the charge.
The prosecution has alleged the components linking the truck and trailer had failed and caused the tanker to come loose.
Mr Daley had been driving that truck for three years at the time and said if they were loose, he would have "absolutely, 100 per cent" felt it while driving.
Asked by Heavy Mechanics defence barrister Daniel Gurvich, QC, if he felt the connection was loose, Mr Daley said "no, not at all".
He said when it came to maintenance, the company was "very thorough - very, very good workmanship".
Crown prosecutor Andrew Palmer, QC, told him that "we're not going to ask questions about the circumstances" of the fatal crash.
Mr Daley no longer works as a truck driver and is now a sales representative for a different transport company.
Arnold's Fruit Market Managing director Roger Arnold gave a character reference for Heavy Mechanics, saying he used the company to service the market's semi trailer and tray truck.
"I believe they're excellent, that's why we use them," he said.
"Everyone I speak to speaks very highly of them."
Mr Gurvich said the defence witnesses in the trial provided character references for Heavy Mechanics.
"A company who is of good character is unlikely to have committed a crime, that is the logic," he said.
WorkSafe inspector Matthew Reid also said Heavy Mechanics had never before been charged with occupational health and safety offences in Victoria.
Both the prosecution and defence closed their cases on Monday, with closing arguments due to start when the trial continues on Tuesday.