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Diego Hernandez Diaz


Advises utilities and industrial companies on harnessing the power of digitization and advanced analytics to navigate the energy transition, improve performance, and reduce costs


Diego is a partner who works with Power Solutions, a McKinsey tool that helps electric-power utilities improve performance and reduce costs by unlocking the value of digital and advanced analytics. He is responsible for developing Power Solutions and managing its successful delivery to clients.

Diego has worked extensively with utilities and manufacturers on challenges in operations, maintenance, and strategy across Europe and the Americas.

Examples of his recent client projects include the following:

  • supporting an independent oil company with a strategic review of 11 business lines in 50 countries to assess the potential to be captured from operational excellence
  • collaborating with a global not-for-profit organization on the building of a network of “lighthouses” to highlight best practices in Industry 4.0 advanced manufacturing methods
  • serving a major independent power provider on an earnings-and-cost transformation that identified savings worth $14 million, including measures to boost revenue, improve operational efficiency, and optimize capital spending
  • working with a Fortune 500 advanced-industrial company on its divestiture strategy from a strategic and operational review of the existing business portfolio to a new equity story and operational disentanglement
  • helping a utility to develop and implement a customized technology solution for managing asset performance across a portfolio of more than 30 solar construction projects
Before joining McKinsey, Diego spent four years with an international banking group as an equity research associate. He speaks five languages.

Published work

Decarbonizing the grid with 24/7 clean power purchase agreements,” McKinsey & Company, May 2022

Finding the right (of) way to efficient road operation and maintenance,” McKinsey & Company, July 2021

The new imperative for grid operators,” McKinsey & Company, September 2020

4 myths about manufacturing in the Fourth Industrial Revolution,” European Sting and World Economic Forum, February 2019

The fourth industrial revolution and the factories of the future,” McKinsey & Company, August 2018

Past experience

Credit Suisse
Equity research associate


The Wharton School, University of Pennsylvania
MBA, business administration and operations
BS, finance and management

University of Pennsylvania

MA, international studies

University of Pennsylvania School of Engineering and Applied Science
BS, computer science