Renzie has over 60 years experience as a martial artist and is a black belt in judo and an 8th degree black belt (Eiko Hanshi) in Seido Karate, one of two senior instructors in the world in that system.

A judo champion in his youth and the youngest judo black belt in New Zealand at the time, he was the South Island Open and Middleweight champion, was the third ranked middleweight in New Zealand and a New Zealand trialist.

He then went on to study karate, represented New Zealand, was a finalist in the New Zealand Open,
lived and trained in Japan under the world-renowned karate master Mas Oyama. While there he was offered a contract to fight professionally and was a model in the book 'Advanced Karate'.

Renzie has trained in New York on numerous occasions under his teacher, Kaicho Tadashi Nakamura, the founder of Seido Karate. Has appeared in demonstrations at Madison Square Garden and appeared in the movie 'Strongest Karate'.

Renzie has trained several world champions in Seido Karate and taught in numerous countries.

In 1990 he was part of a team invited to Tokyo to represent New York, to give demonstrations at the Meiji shrine and to assist in conducting seminars and appeared on prime time television.

Performance Psychology:

He is a director of Gazing Performance Systems, an international company that specialises in improving performance under pressure. The company has trained people in over 45 countries and clients include major multi-national blue chip companies, government departments, the military and leading sporting organisations.

Gazing trains in the areas of sport, business and education. Renzie is co-developer of many of the materials used by the company and is also responsible for much of the graphics and design.

He has worked with a large number of sports people, both in New Zealand and overseas including the English Rugby Union's High Performance Department, co-conducting seminars and workshops for coaches, players and referees.

Assisted a number of world and Olympic champion athletes in a variety of sports including triathlon, duathlon, aquathon, swimming, croquet, Seido Karate, speed boat racing, multi sport and adventure racing and also attended the Olympics with the NZ triathlon team.

Over many years has assisted Dr John Hellemans, world-renowned triathlon coach and 8 times world age group champion.

Renzie has worked with a national champion hockey team, gymnasts, trampolinists, rifle shooter, swimmers, boxers, bowlers and three Coast to Coast winners.

His clients have included the All Blacks, Crusaders / Canterbury rugby teams and the Canterbury Rugby Unions International Division, the Silver Ferns netball team, the NZ womans touch team and the Cavaliers hockey team.

In 2016 conducted workshops in Brunei for the Royal Gurkha Rifle Regiment and followed this up in 2017 where he and two others from Gazing conducted training at the Gurkha HQ in Dover, UK.

Along with Dr Ceri Evans was seconded to work with the All Blacks in 2010/2011 to assist in their preparation for the World Cup.

He consults for Lincoln University's Sports Scholarship programme.

Renzie also works closely with the NZ 2012 swim club coach of the year and one of five gold star swim coaches in the country.

Along with another Gazing director, Dr Ceri Evans, Renzie was invited to give a talk on mental conditioning at Oxford University.

In 2009 he and fellow kiwi and Gazing director Bede Brosnahan worked in Soweto conducting workshops for teachers in Leadership and Pressure in the Classroom.

Has worked with secondary schools, with staff and with the area principals association. Renzie also talks at conferences, both here and abroad.
Along with Dr Ceri Evans was co-developer of the Red Blue model

Books:

Together with Dr Evans he contributed to 'Mind Games' – a book concerned with the mental aspects of performance published in London, 2004.

Renzie also contributed to Endurance Sports Diary 2005, a handbook for triathletes and multi sport and Triathlon Coaching by Dr John Hellemans.

Contributed to Lincoln Univerities book by Prof Mike Hamlin "The Science and Pracitce of Rugby Training"

Occupation:

He presently works as a company director, graphic designer and was for some years a therapist at a local medical clinic.

An award winning graphic designer Renzie was a judge at the 1993 New York Art Directors' Club's International Awards.

Has had his own design business for many years and has produced a wide range of work from logos, brochures, numerous books and also illustrates.

He has also lectured in design and illustration at tertiary level.

In conjunction with Tucker Media he has produced a series of books including a very popular series for children.

As a musician Renzie was a finalist in the Tamworth songwriting awards and has released four albums, mostly of his own work.

His songs have appeared on national radio and in TV and radio ads.

Professional Training:

He trained under the Elisabeth Kübler Ross organisation in the USA, Australia and New Zealand as well as having a background and training in other therapeutic modalities.

Is an Avatar master and for a few years gave a series of long distance lectures to post-graduate students on facilitating change for patients of health professionals.

Renzie's broad background gives him a unique perspective on the building blocks to success in a variety of domains.

Awards:

His work in the community was recognised recently when the city of Christchurch (New Zealand) presented him with a civic award and in 2008 he was given a 'heroes' award by the community.

He has been inducted into the World Martial Arts Hall of Fame. In 2012 Renzie was awarded the Queens Service Medal.
In 2017 awarded a Prime Minister's Scholarship

Published works Include: