MyDoble / Portal Login EN SEARCH PRODUCTS SOLUTIONS SERVICES TRAINING ABOUT EVENTS Blog Videos Downloads Support Contact Us Careers DISCOVER DOBLE Solutions built on a century of innovation and expertise Doble Engineering Company Founded nearly a century ago, Doble’s products and services continue to evolve, but its commitment to bring the utility industry together – and move it forward, has never wavered. Humble Beginnings Doble Engineering Company was founded in 1920 by Frank C. Doble, a graduate of Tufts University. Soon after graduation, Frank rented out space at the university and began to develop diagnostic test equipment for the young electric utility industry. Doble’s first breakthrough was the Portable Insulation Test, a method to measure the health of bushings before they failed. A History of Innovation As Doble expanded its work with more utility companies, it became clear that there was an immense opportunity for increased collaboration. In 1934 Doble hosted its first customer conference, giving utilities an arena to exchange ideas with each other and Doble, problem solve challenges and share the results of the tests they ran with Doble equipment. Through this feedback and collaboration, Doble has become a true partner for the power industry’s testing needs, providing lab services, consulting, cutting-edge software and gold-standard hardware products that make the industry safer, smarter and more efficient. Transforming an Industry Today, Doble offers a comprehensive and extensive scope of diagnostic products and services to test and maintain transformers, bushings, protective relays, circuit breakers, rotating machines and more. With more than 400 employees and 5500 customers, offices in eleven countries, and 55 million points of test data for more than 1 million different electric apparatus, Doble is dedicated to helping the global power industry overcome its challenges, no matter how big or how small. Doble Catalog OUR EMPLOYEES ARE OUR MOST IMPORTANT ASSETS. JOIN THE DOBLE TEAM. LEARN MORE PRODUCTS Condition Monitoring Enterprise Asset Management In-Service Testing & Assessment Oil Standards Off-line Testing & Assessment Protection Testing Security & Compliance SOLUTIONS Transformers Bushings Protective Relays Circuit Breakers Rotating Machines Cables SERVICES Client Services Consulting & Testing Services Laboratory Services Equipment Rentals Doble Resource Library SUPPORT Overview Downloads Trouble & Failure Reporting Form ABOUT Discover Doble Leadership Team News Careers Contact Us Quality Commitment EVENTS Doble Events Training Industry Events Webinars Earning CEUs Doble is an ESCO Technologies Company Doble is an ISO 9001 & ISO/IEC 17025 & 17034 Certified Company. © 2021 Doble Engineering Company. All Rights Reserved. Privacy Policy & Legal Disclosures.