Quester Tangent Corporation (QTC) is an independent North American supplier of train electronics and software for the rail transit industry. Quester Tangent designs, develops and manufactures vehicle monitoring hardware and software for the global rail transit industry, including monitoring and control products, on-train displays, communication and data networks, and passenger information systems. Quester Tangent facilities include of working space. The company has over of environmentally controlled manufacturing floor including for engineering prototyping, of inventory space and of testing space including a full electromagnetic compatibility/electromagnetic interference (EMI/EMC) lab. History Founded in 1983, Quester Tangent Corporation initially served the marine sciences markets, providing equipment and systems for non-destructive, acoustic remote sensing of the seabed to assist with seabed classification and environmental monitoring. In 1994, Quester Tangent started producing monitoring and diagnostic systems for the rail transit industry. Rail Transit Products With over 7,000 products installed in revenue-service, Quester Tangent supplies train management, passenger information and fleet diagnostics systems for new builds, retrofits and overhauls. Products include monitoring and control, on-train displays, event recorders, communication and data networks, passenger information systems, and wayside software: FleetWise Software TestWise TrainWise Monitoring and Control TrainWise Networks TrainWise Passenger Information TrainWise Engineering Management Interface TrainWise Train Configuration Manager Train Display Panels Driver Display Units Fault Display Panels Controllers Event Recorders Train Network Controllers Train-Wayside Controllers Emergency Braking Acceleration Limiting Devices (EBALD) Brake Assurance Monitors (BAM) Low Voltage Power Supplied and Controllers Driving Simulators Quester Tangent also offers a number of services: System integration Project management Custom engineering Manufacturing Maintenance and warranty support Customer service Training Clients Clients include: Detroit People Mover Maryland Transit Administration (MTA) Massachusetts Bay Transportation Authority (MBTA) Metropolitan Atlanta Rapid Transit Authority (MARTA) Metropolitan Transportation Authority (MTA) NJ Transit (NJT) New York City Transit Authority (NYCT) Port Authority Transit Corporation (PATCO) Rapid KL SkyTrain / British Columbia Rapid Transit Company (BCRTC) Southeastern Pennsylvania Transportation Authority (SEPTA) Washington Metropolitan Area Transit Authority (WMATA) Countries Served Currently, Quester Tangent is associated with operations in: Canada China France Italy Japan Korea Malaysia USA Historically, Quester Tangent Marine Division operated in: Australia Belgium Brazil Canada Chile China Croatia Cyprus Denmark England France Germany Iceland India Iran Ireland Israel Italy Japan Lithuania Malaysia Mexico Netherlands New Zealand Norway Portugal Romania Russia Scotland Singapore Spain Taiwan UAE USA Wales Marine Products On August 12, 2014, ownership of Quester Tangent's Marine Division - including all the assets, intellectual properties and patents