. Its leading United States-based national advertising agencies include Arnell Group, Goodby, Silverstein & Partners, GSD& marketing consultancy, public relations, promotional marketing and specialty communications. The company's leading media agencies are part located in New York where it employs nearly 250 people.

. Its leading United States-based national advertising agencies include Arnell Group, Goodby, Silverstein & Partners, GSD& marketing consultancy, public relations, promotional marketing and specialty communications. The company's leading media agencies are part located in New York where it employs nearly 100 people.