in the disciplines of advertising, marketing services, specialty communications, interactive and digital media and media buying services. Its leading United States-based national advertising agencies include Arnell Group, Goodby, Silverstein & Partners, GSD&located in New York where it employs nearly 250 people.

in the disciplines of advertising, marketing services, specialty communications, interactive and digital media and media buying services. Its leading United States-based national advertising agencies include Arnell Group, Goodby, Silverstein & Partners, GSD&located in New York where it employs nearly 100 people.