The health board in the Western Isles has confirmed its medical director Dr John Smith is to retire.
An executive support team is helping to run health services
Dr Smith was one of three senior managers blamed by staff for low morale and a massive overspend.
NHS Western Isles chairman David Currie resigned in August and a month later chief executive Dick Manson said he would move to another role in the NHS.
Earlier this year, a vote by staff showed they no longer had confidence in the three managers.
In the summer Health Minister Andy Kerr installed a new interim chairman and sent a support team to the isles.
Malcolm Wright, who heads the Scottish Executive-appointed support team, has been serving as interim chief executive.
The health minister said a new full time chief executive would be appointed and the board would continue moving towards a fresh approach to how it runs health services.