The power and utilities business models of today need to transform to enable a more complex and resilient system that will be needed for the energy transition.

Trey Thornton

EY Americas Power & Utilities Leader

Experienced business leader. Active leader in the Southern California business community.

Trey is the EY Americas Power & Utilities Leader and oversees all of the consulting, strategy and transactions, tax and assurance work within the sector. In his 20+ years in the management consulting industry, he has worked with electric, gas and water utilities clients across the globe. He is also an active business leader in the Southern California market in critical business organizations, such as the Southern California Leadership Council and the Los Angeles Chamber of Commerce.

Prior to joining Ernst & Young LLP, he worked for another consulting firm, holding several leadership roles.

Trey earned his BS degree in Physics from UC San Diego and his master’s degree in Computer Science from University of Southern California.

How Trey is building a better working world

Trey guides numerous EY teams at leading utilities in developing capabilities, business models and a mindset centered around the agility and collaboration required to accomplish a successful energy transition. 

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