Michael Baker Corporation, through its operating subsidiaries, is engaged in providing engineering services for public and private sector clients worldwide. The Company's business is principally in the United States of America. The Company operates in two segments: Transportation and Federal. The Transportation segment provides services for surface transportation, aviation and rail and transit markets. The Company’s Federal segment provides services for defense, environmental, architecture, geospatial information technology, homeland security, municipal and civil, oil and gas, telecom and utilities, and water markets.