Dean Moore, who joined the security printing PLC as a non-executive director in June, has become interim CFO with immediate effect.
The previous interim CFO, Charles Andrews, who has been in post since April, will remain with the group for a short handover period.
The group has now had four CFOs or interim CFOs in the space of three-and-a-half years.
Moore is a chartered accountant with more than 35 years of PLC experience in senior financial positions.
His previous roles include chief financial officer at Dignity, interim CFO at Cineworld and CFO at N Brown Group. He retains his non-exec roles, one of which is at THG, the new owner of the City A.M. business.
Moore also becomes an executive director at De La Rue, which has experienced a number of boardroom and non-exec changes during a torrid trading period involving multiple profit warnings.
Former CFO Rob Harding announced he was leaving to join PayPoint at the end of January. His six month notice period has now concluded.
Activist investor Crystal Amber Fund has increased its stake in the PLC further since it upped its holding in early July, and now holds 16.48% of its shares.