John obtained his law degree in his home country of Australia through the University of Adelaide and practiced law in Australia for three years prior to traveling to the UK on a working holiday.
In 1992 he settled in Gibraltar and worked as a senior solicitor with a major law firm specialising in commercial law, international tax planning and private client matters. In 1999 he established his own practice, Verralls Solicitors, in Gibraltar, where he remains the senior partner.