Troughton steps up as Aberdeen chairman
Mr Cornick intends to retire as chairman and non-executive director at the end of this financial year on 30 September.
He joined the board in January 2004 and became chairman in January 2009. Mr Troughton was appointed to the board in July 2009 and was appointed senior independent non-executive director in October 2014.
Mr Troughton was a partner at Cazenove before moving to Fauchier Partners in 2003 where he was chief operating officer.
Jim Pettigrew also intends to step down from the board on 23 April. He has served since April 2010 and is chairman of the audit committee. A new independent non-executive director will be appointed subject to receiving regulatory approval.
Intended appointments to the roles of senior independent non-executive director and chairmen of audit and remuneration committees will be announced in due course.