The Author
Gareth A Holebrook
Career
- Royal NavyTrained as a Weapons Engineering Artificer in the early 1990s.
- Sony, NavmanEngineer at Sony, then senior delivery and leadership roles at Navman.
- 2004Founded PerformO, a biohacking technology company.
- 2011Agile coach, leadership adviser and executive coach across technology, enterprise and regulated environments.
- 2026Ishi: The Discipline of Determined Intent, PerformO Publishing, foreword by L. David Marquet.
Endurance
Kona, 2022
Between 2005 and 2025, Gareth completed ultra-endurance events including Ironman, and represented New Zealand more than 10 times. He raced the Ironman World Championship in Kona in 2022, after an 18-year pursuit.
Endurance sport did not teach him motivation; it taught him constraint, recovery, judgement and the cost of ungoverned persistence.
Scotty T
Scotty T took many of the photographs on this site. He followed Gareth round the Kiwiman Double in 2021, taking photographs and supporting him, and he is coming to Norseman in Norway in 2027 to photograph him there.
Northland
Waipu
Gareth lives in Waipu with his wife, Dr Thiri Aung-Holebrook. Together the couple run a 20-acre smallholding with livestock, apple orchards and horses, including Kaizen the Kaimanawa, a rescued horse.
