When you sit down with Collegian John Calder (School | Sargood 1959–1963), it's difficult not to feel just a little inadequate. Not because he makes you feel that way, quite the opposite. John has spent more than four decades helping to transform orthopaedic surgery in New Zealand and Australia, establishing hospitals, chairing national organisations, pioneering medical innovation, building successful businesses, and mentoring generations of surgeons. Yet as he turns the pages of his school photo album, none of those achievements are what he chooses to talk about first.

John was one of the 60 Foundation students who arrived at St Paul's Collegiate School in February 1959. His parents, living in Rotorua, decided the newly established school offered something different, so they sent him to boarding school. 

"When I arrived, the campus was two buildings and a whole lot of dirt. There was only one playing field, swimming sports were held at the municipal pool, and weekends were largely spent creating our own adventures. We brought ourselves up," John laughs.

Life wasn't easy, he admits. "I was probably a bit homesick." Discipline was strict, and the facilities were basic. Yet when John reflects on his years at St Paul's, he speaks about the boys growing up together, the nicknames they invented for their teachers, and the adventures they created for themselves. More than sixty years later, he still keeps in touch with fellow students Richard Trott (School | Sargood 1959–1963) and John Nettleton (School | Sargood 1959–1962).

Among the headmasters who served during those early years, one left a lasting impression. "Jim Leggat (Acting Headmaster 1962–1963) was inspirational," John says. "He got everybody on side and made us into much better people." The qualities that shaped John at St Paul's, resilience and practicality, would quietly underpin everything that followed.

After leaving school, John headed to the University of Otago to study medicine. Originally drawn to psychiatry, he was soon captured by surgery. "I liked the practicality of orthopaedics. You could make a real difference to someone's life quite quickly."

That practical mindset took him from Otago via Perth to London, then back to Australia, before finally settling in Tauranga in 1987. Along the way, he trained under some of the world's leading orthopaedic surgeons, built one of Canberra's busiest practices, and developed a reputation that would eventually see him become President of the New Zealand Orthopaedic Association in 2010. 

When asked what stands out across an extraordinary career, John doesn't mention titles or honours. He tells the story of a 23-year-old logging contractor. A falling tree had crushed the young man's pelvis, leaving him lucky to be alive but barely able to walk due to a destroyed hip joint. CT technology was still in its infancy, producing one-centimetre image slices and offering no way to visualise the pelvis in three dimensions. "So we worked it out ourselves," John says matter-of-factly.

Together with his patient they painstakingly traced each CT slice onto one-centimetre sheets of Perspex. Every layer was cut by hand before being stacked and glued together to create a physical model of the pelvis. It was an extraordinarily simple solution to a complex problem.

Years later, as medical imaging and 3D printing evolved, those early ideas became the foundation for custom-printed titanium implants. John became involved in commercialising the technology, helping build a company whose innovations would eventually be recognised and adopted internationally.

The story came full circle more than twenty years later. The same young man returned after his original hip replacement had worn out. This time, John was again in theatre for the replacement of part of his pelvis with a custom 3D-printed implant. "He's the poster boy for 3D printing," John says with a grin.

John's influence extends well beyond the operating theatre. When a struggling hospital in Tauranga faced closure, John and a colleague assembled a consortium to save it. That venture eventually grew into Grace Hospital and the Grace Orthopaedic Centre, which today is one of Australasia's largest orthopaedic clinics and is home to 18 surgeons.

Alongside his surgical career, he chaired hospital company boards, established businesses, and supported countless healthcare initiatives. He shrugs when asked how he found the time. "Orthopaedics was always my first priority," he says. "My night job was everything else."

One of those "night jobs" began with his own mother. Like many older New Zealanders, she had moved into a retirement village. Watching the financial model, John became increasingly uncomfortable with the way residents could lose a significant portion of the capital gains on their homes. "I thought, this isn't right," he recalls. Rather than simply criticising the system, he helped create an alternative.

Freedom Villages was built around a fairer model, allowing residents to retain most of the capital growth in their homes. Today, Freedom Villages operate in Tauranga, Cambridge, Matamata, Rotorua, Christchurch, and other centres, giving thousands of retirees another option for independent living.

Despite everything he achieved, it is the people John remembers most. Amongst many thousands of patients, one favourite was a young man in Canberra who had been involved in a horrific head-on collision. He had broken all four limbs, suffered devastating chest and facial injuries, and was fighting for his life. After hours of stabilising him, John leaned over and said, "Bill, we're going to take you into the theatre now." Bill's response? "Oh, good," he replied. "What's on?" John still laughs at the memory. "I thought then, this guy's a survivor."

"I used to joke with people that the only reason I did orthopaedics was to keep my carpentry up to date." Although retired now, John remains interested in where medicine is heading. "There's already robotic involvement in joint replacement," he says. "But I don't think robots will ever take over completely. There's still a fair amount of art in it, and I think there will always be a need for surgeons' hands." John does believe, though, "There'll come a time when people will look back at what we did, like putting in joint replacements, and think, 'Did they really do that? How primitive!

Retirement has been characteristically full for John. Summers are spent at the family property on the Coromandel, while for twelve memorable years, John and his wife, Cushla, explored the waterways of France during the New Zealand winters aboard their canal boat before selling it in 2024. Today, they are enjoying spending time with family and grandchildren, reconnecting with friends, and settling into their award-winning new home overlooking Tauranga harbour. John jokes, "You don't normally love your builder at the end of a build, but we think ours is pretty good."

Looking back over a career that has changed countless lives, John simply smiles. "It's been fantastic," he says. "There's not much I would want to change, really."

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