He was appointed to the board as a non-executive director on 1 October 2007 but has been involved in the financial management of the business since the departure of the previous FD, Nick Parker.
Kinsella will remain a non-executive director until his executive appointment starts on 1 September 2008.
In addition to his FD role, Kinsella will assume responsibility for IT and associated systems.
He has been CFO at engineering company TI Automotive.