That new-look will be challenged big time, when Craig races at Ironman Taupo 70.3 in early December, something he admits he thought might never happen again.
"In terms of my sport the surgeons were confident that I would be able to continue with golf and curling as the starting positions are stationary. Other games wouldn't be possible. They told me I might fall over a lot and bump into things more often when I went out for a run. I never asked about triathlon. I assumed my days in triathlon were well and truly over."
While early conversations with the surgeons focused on quality of life and his ability to continue successfully in his career, questions quickly turned to sport and the challenges that he might face in doing what he, until then, had very much taken for granted.
"There were the usual tough moments in recovering from the surgery and handling six weeks of radiation when I was very tired and physically depleted. There was no doubt I was very nervous about what lay ahead, especially after I was first diagnosed.
"However, talking to my friends and being open about what was happening to me really helped. Sir John Kirwan is so right. I remember being worried about what was going to happen to my career in professional services when one of my golf buddies came up with the magic line for when I meet a prospective client, it was along the lines of 'I might have lost one eye to cancer, but the other is firmly focused on your business'. It cheered me up no end."
Craig credits much of his recovery and his outlook on life to a close circle of friends who never wavered in their support or confidence in a full return to action.
"I was blessed to have friends and teammates who assumed I would be able to continue golfing and curling as before. I played my first game of golf on Boxing Day four weeks after my surgery. Due to the surgery I could barely hit a shot, but I gave everyone in the group an eye patch to wear when they hit their tee shot so they could experience some of what I was going through.
"My curling team was also incredibly supportive, and it was a great relief when I went to Dunedin for a curling weekend and was able to throw my first stone as if not much had changed. Six to eight weeks later I was lucky enough to curl for the New Zealand senior men's team at the World Seniors Curling Championships in Sochi, Russia and win a bronze medal. It was a fairy tale end to an incredibly challenging six months."
Triathlon however, was going to be another matter. The co-ordination, vision and confidence required to swim, bike and run presented a much greater challenge to Craig.
"I have mentioned how comforting it was to get back to my golf and curling after my operation. Triathlon was another experience again though. I am not a naturally committed triathlete nor a natural trainer. I am at the back of the field. I am a much better curler and golfer than I will ever be a triathlete. However, it's a sport which keeps drawing me back in and I love it. I love the structure and discipline the training brings to my life and the challenge it demands of you.
"Last year I made a return to triathlon for the first time after the loss of my eye. I thought I would do one sprint triathlon just to show I could do it and then sell my bike and hang up my shoes for good. However, I will never forget the joy I got from the simple act of arriving at the event, racking my bike and unexpectedly meeting friends who had been part of my triathlon journey for the past 25 years.
"Appropriately the triathlon was at Maraetai – phonetically pronounced 'my-right-eye' – which is the one I still have. That day I realised the best hour of triathlon could very well be the hour before the gun goes, when you rack the bike, set out your transition area and try and squeeze into your wetsuit which didn't fit you last year either. Of course there are nerves, but there is joy as well.
"So, Ironman Taupo 70.3 is not about a return to triathlon, I am already back. However, I have been inspired by so many other Ironman athletes over the years who have tackled events, whether half or full, with much greater challenges than mine. My goal is simply to finish, after all, as 'Iron Mike' Stowers reminds me - finishing is winning."
While many of the challenges have been physical, it has been hugely challenging on an emotional and mental level for Craig, something he is working on every day.
"I have been very lucky not to have dropped into a dark place following the change in my circumstances. I use humour a lot. If I can laugh at myself then it settles everyone around me and lightens my load.
"Beforehand I was a born worrier about the future and what lay ahead. I always imagined if one thing turned to custard my whole world would fall apart and the complete disaster scenario would unfold. This was of course ridiculous as matters rarely get as bad as you fear they will.
"Thankfully, I am not that way anymore. I like to think I live much more in the present. I don't look back and I don't worry so much about the future. While I never thought I was going to die – and had total trust in the medical profession - I am grateful for every day and try and live each day in that knowledge."
Craig is learning to cope with the loss of the eye, and the impact it has on his day to day life.
"Aside from choosing which eye patch to wear each day, the key changes arose around the loss of my peripheral vision and the judging of depth and perception. I now drive much smaller cars to give me more room. I get blind–sided a lot by people walking up on my left-hand side when I don't expect them to. I also find it difficult to cope with big crowds in unstructured places. I try not to drive in the dark or bad weather. And I tend to bang my head a lot."
Ironman Taupo 70.3
Taupo, December 9
Individual and team events
Entries and information at www.IRONMAN.com