Carey, who was appointed last night at the BCO's Annual General Meeting, will replace current president Ann Minogue, a partner at law firm Linklaters.
He set up Carey Jones with partner Chris Jones in 1987. Now in its 20th year, the firm came in at number 43 in this year's AJ 100 and has offices in London, Leeds and New York.
Carey said: 'My ambition for the year is to support the BCO's efforts to extend the its mission of seeking to research, develop and communicate best practice in all aspects of the office sector.
'I want to take it on to a more international footing and strengthen its relationships with other organisations,' he added.