SPOKESMAN

A 'spokesman' ('spokeswoman' or 'spokesperson') is someone engaged to speak on behalf of others.
The term ''spokesperson'', invented to replace the conventional ''spokesman'', is a typical example of a gender-neutral neologism.
In the present media-sensitive world, many organizations are increasingly likely to employ professionals who have received formal training in journalism, communications, public relations and public affairs in this role in order to ensure that public announcements are made in the most appropriate fashion and through the most appropriate channels to maximize the impact of favorable messages, and to minimize the impact of unfavorable messages. Popular local and national sports stars (such as Michael Jordan or Bob Uecker) are often chosen as spokespeople for commercial advertising.
A corporation may be represented in public by its Chief Executive Officer, Chairman or President, Chief Financial Officer, Counsel or external legal advisor. In addition, on a day to day level and for more routine announcements, the job may be delegated to the Corporate Communications or Investor Relations departments (or equivalents), who will act as spokesmen.
Green parties in the world are usually led by spokesmen (two, as a man and a woman), instead of a chairman or a president.