Dennis Holt founded Western International Media Corporation in Los Angeles in 1970 as an advertising agency resource. He expanded the concept of media buying which he had developed in New York City where he created the world's first media buying service.

From the original office in Los Angeles, Western expanded to 39 offices in the United States and Canada, Europe and Asia. It became the largest media management company in North America with annual billings of $6.1 billion, and over $12.5 billion worldwide, making it the largest media management company in the world.

Dennis Holt created over forty subsidiaries to service clients, a few of which included: Western International Research, Western Multicultural Group, Promotional Broadcast Service, Western Direct, Western International Media Corporation, Direct Mail, Outdoor Services, U.S. Yellow Pages, Smart Ride, Motivational Incentives Group, Casablanca Productions, Western International Syndication, Magazines Service of America, Promotion House, Western International Media Print, The Fulfillment House, Video Productions, Phoenix System, Cyclops Data Systems, Cable Call and Cable Stat.

During Dennis Holt's tenure, Western made numerous acquisitions including Newspaper Services of America (NSA), the largest buyer of newspaper in the United States; ATI, an enhanced 800 number business that was an extension of Western's Patriot Direct Connect System; Media Partnership Corp., a free-standing subsidiary media partnership, located in Norwalk, Conn.; and Media Inc., a prestigious New York buying service.

Western more than fulfilled Dennis Holt's goal of a one-stop shopping service for advertising agencies and corporations. Its size and stature in its field notwithstanding, Dennis has always considered his firm to be a large extended family and, until he sold to IPG, he knew the name of every person in his employ - over 2,000 people.

After selling Western International Media Corporation to IPG, and his five-year non-compete agreement had run out, Dennis couldn’t wait to get back in the business and founded U.S. International Media (USIM) in 2004. Dennis and his family of professionals plan to bring their energy and substantial expertise to clients of USIM the same as they did for its predecessor. USIM is the most diversified, fastest growing, full-service media management company in the United States.

USIM’s corporate headquarters are located at 1201 Alta Loma Road, West Hollywood, CA 90069-2403, (310) 659-0711. The company’s website address is www.usintlmedia.com.