Drummond said Corporate Culture is now looking to hire an MD with responsibility for day-to-day affairs.
'The CEO role is about strategy and client satisfaction; the MD's role is more that of a general manager. I want to focus on developing the business,' said Drummond.
He is also set to appoint a head of business development and the consultancy's first creative director.
The creation of the CEO role follows the retirement eight months ago of managing director Keith Ely. Drummond had been filling that role in the interim.
Drummond said his main challenge will be to manage the firm's expansion.
Corporate Culture has temporary operations in London and Scotland, but Drummond said he hoped to open permanent bases in both areas by the end of the year.
'There will be some international expansion, but we're not really looking to go outside the UK until the end of next year,' he added.
Drummond said the firm is working towards an MBO from the existing shareholders within the next four years.
Corporate Culture will not replace Drummond in his former post as strategy director, a role he will continue to oversee as CEO.
The firm boasts a blue-chip client list including BT, BSkyB and Marks & Spencer.