The Churchlands resident said he joined the club in 1973 and had been a dedicated volunteer surf lifesaver ever since.
“I had coached mothers when they were kids and I’m now coaching their kids,” he said.
“It’s the most rewarding thing you can ever wish for; you learn self-discipline which is a really valuable skill for young people.
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Trigg SLSC celebrated its 369-strong team of volunteer surf lifesavers last Saturday to acknowledge the completion of 118 volunteer beach patrols, a total of 6935 volunteer hours since the beginning of the season on October 1 last year.
President Shane Bowbridge said the volunteers had done an incredible job keeping beachgoers safe.
“Their commitment and passion to beach safety is second to none; it really is something to celebrate,” Mr Bowbridge said.
Mr Greenhill said the most rewarding moment of his surf lifesaving career was when he and a young group of lifesavers saved a man’s life.
“When we landed him back on shore he was virtually blue and I think the most rewarding thing that I’ve ever seen was his face changing back to normal colour after he was resuscitated,” he said.
“Surf lifesaving has been a lifelong commitment, one that I would recommend to anyone.”