Having graduated in 1970 with a degree in chemistry from London University he spent the first part of his career in IT at Midland Bank. In 1986 he joined venture funded technology company, Space-Time Systems, as part of their Series C fund raising. Space-Time was sold in 1988 and Harris returned to Midland Bank to become founding CEO of the world's first major telephone bank Firstdirect, which is now a subsidiary of HSBC.
Between 1991 and 1995 he was Chief Executive of UK Telco Mercury Communications where he created a new consumer business which was later sold to NTL (now Virgin Media) for £2.5bn. He was also Chairman of the start up mobile operator - One to One, which was later sold to T-Mobile for $10bn.
In 1995 he moved on to the position of founding CEO of Prudential Banking plc and then the CEO of its successor, Egg - which he took from concept to a billion pound public company in just 2 years. Egg was the first major internet bank in the world and for several years had more internet customers than any other bank. It is still regarded as the most successful of the internet banking start-ups and is now owned by Citi.
Having left Egg in 2005 he co-founded Garlik, which is now the UK's leading supplier of consumer identity protection software and is currently expanding into the US, Germany and Italy. Harris is Executive Chairman of Garlik which won the prestigious BT Flagship Award for innovation in 2008.
In November 2008 Harris co-founded Federation100 with serial entrepreneur Mynoo Blackburn and business coach Anurag Gupta. Federation100 is a business incubator and accelerator for SMEs.
Harris has also been Chair of Innovation at Royal Bank of Scotland from 2005 until March 2009, where he supervised the establishment of a group wide innovation programme.
He is a regular speaker and seminar leader at conferences and business schools including the Sloan School at MIT and is author of best selling business book - Find your light bulb - how to make millions from apparently impossible ideas.