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McMillen Jacobs Associates is an engineering specialist in the railroad industry, offering analysis, design, construction management, and inspection services covering all aspects of railroad engineering, including asset management, tunnel rehabilitation, clearance improvements, bridge and embankment improvements, and undercrossing and grade separations. The firm utilizes proven successful techniques and specifications suitable for live-track or partial closure work windows. Clients include Class I railroads, municipal light rail/commuter rail entities and state highway departments.