The son of former Aston Villa striker and European Cup hero Peter Withe, Jason Withe's professional career did not emulate his father's. He spent 1986 to 1990 with West Bromwich Albion before spending some time in Finland with KPV Kokkola in 1990. Returning to England, he played for Stafford Rangers, Stockport County, Crewe Alexandra, Burnley and Telford United.

After his playing career finished, he was 'Head Coach' of Thailand Premier League side BEC Tero Sasana. He led the side tothe domestic double in 1999-2000. He moved to Singapore to become Manager of Home United FC who play in the S-League where he steered them to a respectable 2nd place in 2002. Jason then moved back to Thailand as Technical Director and Head Coach of Bangkok Bank FC. In 2005 Jason became Assistant National Team Manager for the Indonesia Football Association.

Jason moved back to the UK in 2007 becoming Head of Youth for Aldershot Town FC. Jason began scouting for Norwich City FC and is an FA Tutor delivering FA Qualifications to budding coaches. He was also chairman of Knowle. In July 2010 became Director of Football for Southam United FC who play in the Midland Combination

Jason is one of the most qualified coaches in the world here are a list of his qualifications; Psychology for Football Level 5, Academy Managers Licence, Certificate in Applied Management, UEFA Pro Coaching Licence, Sports Physiology Diploma, FA Fitness Trainer, Exercise Physiology Diploma, FA Goalkeeping Coaching ‘A’ Licence, FA Generic Tutor Trainer, Certified Practitioner of Neuro Linguistic Programming(NLP), FA Youth Coaches Certificate, FA Goalkeeping Coaching ‘B’ Licence, FA Tutor Assessor, UEFA ‘A’ Licence, FA Advanced Coaching Licence etc

He was appointed as the centre director of Leicester City Girls Centre of Excellence in June 2011

In 2014 he joined Thai side Songkhla United as manager then moved to Nakhon Pathom United in 2015 before becoming Director of Football for Sukhothai between 2016 and 2017. They won the Thai Cup in 2016. He then managed Super Power Samut Prakan and Inter Bangkok aka Deffo before moving to the Phillipines on 30th March 2021 to be head coach for United City.