Mr Cairns said making the port a safer workplace was a collaborative effort.
"Our workplace fatality rate is more than five times the best in the world in the UK - it's something I really want everyone to work hard to improve ... Unfortunately, there is a bit of complacency which is the biggest killer on any work site," he said.
"I'm certainly sincere in my goal to ensure there is zero harm to people who work at the port, so they go home in the same condition they arrived here in. But Health and Safety obligations don't just rest on employers ... employees also need to take personal responsibility to ensure they don't put themselves or their colleagues in harm's way,' he said.
To help drive home that message in the next two to three weeks, large safety message billboards will be erected at both entrances to the port, Mr Cairns said. The billboards were planned in advance of the recent prosecution case, he said.
Mount Maunganui Tauranga Maritime Union president Peter Harvey said he had no confidence there would be a marked improvement to the health and safety environment at the port without radical changes.
"We've got to stop the carnage. One death in a workplace is a huge event, and one is too many. The reality is that for every fatality or serious injury there has to have been hundreds of near-misses or first aid cases leading up to it," he said.
Mr Harvey called for changes to the Health and Safety in Employment Act.
"The permissive regime to health and safety practices is the real problem.
"There is far too much discretionary power for employers under the act, and I want to see greater enforcement measures put in place," he said.
He would like to see an independent health and safety inspector based permanently at the wharf.
"There also certainly needs to be more empowerment of workers to speak up about problems without fear of ramifications," he said.
Forty-one Kiwis died at work last year and 6000 were injured seriously.