Ruth Evans was director of fundraising and comms for five years, but left to go freelance at the end of 2007.
Mind is reviewing the department and is yet to make a decision on whether to replace Evans.
In the interim, head of media Clare Ashby is heading up the three-strong comms team. Ashby said Mind was on the hunt for new members of staff. Head of major giving Kathleen Miles is acting as interim director of fundraising.
The charity highlighted its priorities for the coming year against the backdrop of increased media interest in mental health.
'Mental health is rarely out of the news recently, and we will continue to push the agenda further in 2008,' said Mind's policy director Sophie Corlett. 'We will be campaigning on difficult issues including justice and debt, and to ensure mental health gets the prominence it needs as NHS structures come under scrutiny,' she added.
The New Year dawned amid stories reporting that overcrowding was being blamed for the 37 per cent increase in the number of suicides in prisons.
In October of last year, the Government announced plans to increase funding for psychological therapy provision, bringing the total up to £170m a year by 2010/11.