Diana Tremblay

Operating Partner

Castle Creek Financial LLC

Office Phone:

(858) 756-8300


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Bio

Diana Tremblay retired from General Motors Company in September 2017. She had been with that company since 1977, and during her tenure at GM, she held a variety of positions in engineering, manufacturing, and labor relations, including direct operational responsibility for over 50,000 employees. Ms. Tremblay brings broad business experience that includes her previous roles at GM as an engineer, plant manager, head of manufacturing, and lead labor relations negotiator, which together with her knowledge of business services and global manufacturing processes, provides additional international, administrative, and manufacturing experience. From July 2013 until her retirement, Ms. Tremblay served as Vice President of Global Business Services, where she was charged with streamlining administrative processes around the world to improve service quality, reduce complexity, and achieve cost efficiencies in such areas as finance, human resources, real estate, purchasing, asset management, and master data. This was achieved adapting the lean manufacturing system, operational excellence, six sigma, process failure mode analysis, data analytics, and other operational improvement tools learned in manufacturing and applying them to business processes. She has a Bachelor of Industrial Administration Degree from Kettering University (formerly General Motors Institute) and a Master of Science in Management Degree from Massachusetts Institute of Technology. Diana currently serves on the Boards of Itron, Inc. and Lightning eMotors. She also serves on the Board of Trustees for Kettering University. Diana has been married to Daniel for 40 years and has a daughter and son-in-law.

Education