Buaben joined the club as a trialist at the start of pre-season training and has impressed the manager sufficiently to be awarded a full-time contract. On 20 July 2007, Dundee United signed the Ghanaian on a three-year contract, following a successful trial period at Tannadice Park. Levein told the club website: "He's a young player and although talented, will need time to develop and adapt. "I see him as one for the future but have high hopes that he may break into the first team earlier than expected."