Albert Rose was one of 10 people to apply for the position of programme manager (equality and diversity) at the charity last year, but was not one of the five shortlisted. A white Irish woman was appointed.
Rose told an employment tribunal on 14 and 15 May that 51 of the 52 managers at Citizens Advice were white and that he done as well in the scoring process as a white person who was shortlisted.
Citizens Advice admitted that Rose had received less favourable treatment than some of the other candidates, but said staff were unaware that he was black when they were shortlisting. Someone with fewer points had been shortlisted over Rose because he had more relevant experience, the charity added.
Tim Russell, chair of the tribunal, said: "The recruitment process was disorganised, even incoherent, at times. Rules were ignored." But he rejected Rose's claim.
Citizens Advice said it had an action plan to address the lack of black managers and that there were more black people in other tiers of management.