TYLin is a global, multi-disciplinary infrastructure services firm. Headquartered in San Francisco, TYLin established its business in the design of long-span bridges and specialty structures. The firm provides a range of planning, design, construction and project management services to the aviation; bridge; facilities; mobility, planning, and management; ports and marine; rail and transit; and surface transportation industries. TYLin operates from more than 50 regional centers across four continents, and employs a professional staff of more than 3,000 engineers, planners, architects and scientists.