After stints working as a conditioner for Castleford, as head coach of Bramley, working in the player performance department of the Rugby Football League, head coach of Paris Saint-Germain, and assistant coach to both England and Great Britain, he took over the coaching reins at Sheffield Eagles in 1997, taking them to the Premiership semi-final in that year. A year later he was the coach who led Sheffield Eagles to a Challenge Cup final victory over the Wigan Warriors; this triumph has been described as one of the greatest shocks in Challenge Cup history. Sheffield Eagles merged with the Huddersfield Giants after 1999's Super League IV, and Kear retained his job as coach of the merged side before moving on to become the assistant coach to Stuart Raper at the Wigan Warriors. He was coach of the England team in the 2000 World Cup, leading them to the semi-finals.
Later career
He left Wigan for the first team coach role at Hull, working with Shaun McRae. He stepped up to first team coach at Hull in 2005 when predecessor Shaun McRae left to take charge of South Sydney Rabbitohs. He led the club to victory over Leeds, by a 25–24 scoreline in the 2005 Challenge Cup in his first season. However, in April 2006 he was sacked by Hull. He took charge of Wakefield Trinity in July 2006 where he steered the team clear of relegation with four wins from the last six matches of the season, culminating in the great escape and condemning Castleford to relegation to National League One. In 2007 he fielded a predominantly untried squad and led Trinity to 8th position in the Super League, their second highest Super League finish. In 2009 Kear led Wakefield Trinity to 5th position, their highest ever Super League finish. The team were knocked out of the first round of the play-offs by Catalans Dragons. In 2011 Kear left Wakefield Trinity to become head coach of Batley. On 16 July 2014 Kear succeeded Iestyn Harris as head coach of Wales, a role he undertook alongside his position at Batley and subsequently at Bradford Bulls. His first game was against Scotland in the 2014 European Cup. He lost the opening game by a score of 42–18 in horrible weather conditions. After a horrible 2014 European Cup event, his more 'strengthened' Welsh team took on Scotland again in the opening match of the 2015 Tournament. John's team earned their first ever victory after a spree of 12 consecutive defeats which began back in 2011. Wales went on to be unbeaten in the tournament resulting in them winning their first European Cup tournament since 2010. The following year, he was required to make Wales qualify for the 2017 Rugby League World Cup via the European qualifiers. In the opening game at Llanelli, Wales thrashed Serbia by 50 points. He coached the Wales 9s squad at the 2019 Rugby League World Cup 9s.
