Merck & Company, Inc. is one of the leading research-driven pharmaceutical companies in the world. The company works to discover, develop, manufacture and market vaccines and medicines to address unmet medical needs. Merck & Company devotes efforts to increase access to necessary medicines. The company offers a variety of far-reaching programs that donate Merck medicines and help deliver them. Merck & Company also publishes unbiased health information as a not-for-profit service. The company has locations in Argentina, Venzuela, Ecuador, Canada, Puerto Rico, Mexico, Columbia, Peru, Chile, the Dominican Republic and the United States. Richard T. Clark has been the chief executive officer of Merck & Company for more than a year. He has been with the biotech and pharmaceutical firm of rover 34 years. Clark earned a BA degree from Washington & Jefferson College, and a MBA from the American University. Merck & Company, Inc. was established in 1891 and maintains its headquarters in Whitehouse Station, N.J.