Doble Engineering Company

Appliances, Electrical, and Electronics ManufacturingMassachusetts, United States501-1000 Employees

Doble Engineering Company is a Marlborough, Massachusetts-based provider of electrical diagnostics and power system asset management solutions within the Appliances, Electrical, and Electronics Manufacturing industry. The company employs 501-1000 people and operates as part of the Utility Solutions Group of ESCO Technologies Inc. (NYSE: ESE). Doble's product and service offerings cover transformers, bushings, circuit breakers, rotating machines, protective relays, and cables, with capabilities in condition monitoring, online dissolved gas analysis, hydrogen sensors for transformers, enterprise asset management software, in-service testing, protection testing, and security and compliance. The company has a history spanning more than a century in helping electric power industry clients improve operations and optimize system performance. In April 2026, Doble Engineering Company merged with Megger Group under ESCO Technologies, creating a unified platform for electrical asset management on a global scale.

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