Sharon is a Fellow of the Institute of Chartered Accountants in England and Wales, having qualified with Deloitte and Touche in the U.K. After spending time with Deloitte in Chicago and the British Virgin Islands Sharon moved to Guernsey with them in 1999. In addition she is also a member of the Society of Trust and Estate Practitioners.

After successfully completing a private equity backed MBO of the trust and fund administration of Walbrook, a division of Deloitte, in 2003 she sold the business to Barclays Wealth in 2007. As a Managing Director of Barclays Wealth, Mrs Parr reached the position of global head of the Barclays trust and fund administration businesses, comprising over 450 staff in 10 countries, as well as being country head of all Barclays trust, fund administration and other operations in Guernsey.

In 2011 Sharon stepped down from her executive roles to focus on other business areas and interests. She has maintained her directorships of the Bridgemere group of companies; a group that has significant investment interests in the leisure and property development sectors both in the UK and Europe, including a significant shareholding in Redrow plc. In addition she is a director and treasurer of the Guernsey Literary Festival LBG and is active with a number of other Guernsey based charities.

Previously she was a committee member of the Guernsey Association of Trustees.