Development is career development - where will a person go within his or her career, and what does he need in order to achieve his goals, etc. Champion in English has different meanings. It generally means winner, but it is being used here is a different context. The other context is someone who moves a concept forward. For example, someone might 'champion' a cause by fighting for the cause.
Today there are environmentalists who champion animal rights, for example.
Development Coach Champions, then, are the people who introduce the Development Coaching concept and program into a company.