Mark Addison is an independent member of the Advisory Committee on Business Appointments, the body which advises and regulates on new appointments taken up outside government by former ministers and civil servants.
Addison entered the Department of Energy in 1978, taking on a number of posts in operations and policy. Between 2001 and 2006 he occupied various senior roles in the Department for the Environment, Food and Rural Affairs and prior to this he was chief executive of the Crown Prosecution Service (1998-2001).
After leaving the civil service in 2006, he served as civil service commissioner from 2007 to 2012, as well as taking up a non-executive directorship with Salix Finance between 2006 and 2011.
He currently also sits as a public appointments assessor for the Commission for Public Appointments, trustee of the Charity for Civil Servants and chair of the Dorset County Hospital NHS Foundation Trust. 
- 'ACOBA 15-16 Annual Report', Gov.uk, accessed 25 July 2016