Even at age 89 and with four decades' experience in real estate, Ken McCarthy, aka "the godfather", still strives to keep learning.
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"It gives me an interest - as you get older you get less interests," he laughed.
"It keeps the brain ticking over. You can't be running around playing golf or tennis all the time."
Mr McCarthy is a director of Ray White Helensburgh, and a member of their fourth generation, family-owned business, which employs his great-granddaughter.
Mr McCarthy's grandsons Mattias Samuelsson and Simon Beaufils now own Ray White Helensburgh.
Mr McCarthy has been in real estate for 40 years.
Prior to working in real estate, Mr McCarthy was an assistant accountant for the ABC in Queensland before he and wife Patricia moved to Helensburgh.
"The best thing we ever did was to move to Helensburgh in 1971," Mr McCarthy said.
He originally employed sons Warren and Patrick in his business (they've since left the family business, but still work in real estate), and now his two grandsons run Ray White Helensburgh.
Mr Beaufils said earlier this year his 16-year-old daughter Ashlea started working on Saturdays in the business on reception as their "director of first impressions".
"She's really good - she just did an exam in mathematics and got 100 per cent," Mr McCarthy said.
While Mr McCarthy isn't as hands-on these days, Mr Beaufils said his grandfather was still collecting Continuing Professional Development (CPD) points, and achieved 100 per cent on the Elite Agent course he recently completed online.
"He's been the glue who kept us together," Mr Beaufils said. "He's like the godfather, and we counsel his opinion on big decisions.
"He definitely still loves to attend sales meetings too."
Mr McCarthy said while there had been advances in technology throughout his time in the industry, real estate remained much the same business at its core.
"A few different ideas have come in, but apart from that, it's people and houses," he told the Mercury.
Mr McCarthy said his secret to living a long and productive life is a daily swim and a scotch every night.
"I swim every day, yet I have never smoked and I have one scotch and dry every night, just one," he said.
Does Mr McCarthy have any retirement plans?
"I'm just taking it as it goes," he said. "I drop in and have a chat, and do what I can when I'm there.
"Fortunately I can come and go as I please."