John played for England, Indoors and Out, and Great Britain between 1977 and 1988. He amassed a total of over 100 International appearances and represented his Country at Champions’ Trophies, European and World Cups. He captained England on a number of occasions between 1979 and 1981. He was in England and Great Britain teams which won World Cup Silver, European Indoor Silver, European Bronze and Champions’ Trophy Silver Medals during his playing career.

John was in the Great Britain Squad in preparation for the 1988 Seoul Olympics finishing his career as non-travelling reserve for the Olympic Gold Medal winning team. Since 1989 he has been a Consultant GK Coach for the National Governing Body. During this time he has been a member of Team GB at six Olympic Games and Team England at five Commonwealth Games. He regards England Men's and Women's European Golds (2009 & 2015), Great Britain Men’s and Women’s achievements at London 2012 & Rio Women's Gold in Rio as particular highlights of his coaching career.

John has also been Manager and Assistant Manager of the England Senior Men’s Team, managing them to European Bronze in 1991 and European Indoor Silver in 1994. He was Manager of England & GB Women from 2013-2016, culminating in Rio Gold.

He has coached goalkeepers who have been internationally recognised and rewarded including James Fair, Simon Mason, Beth Storry, George Pinner & Maddie Hinch.

In recent years John has also held the Position of Goalkeeping Performance Manager for England Hockey, managing the goalkeeper coaching throughout the Performance programmes. He has organised Goalkeeper Coaching Seminars for the FIH at both the 1998 World Cup in Utrecht and the 2008 Olympic Qualifier in Chile as well as working with the Irish, Scottish, Welsh & other National Hockey Associations at various times during his coaching career.

Now retired from The Hockey Centre, he retired from managing the Gold Medal winning GB Women's Hockey Team after Rio but still offers GK coaching when requested.