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Kassia Yanosek


Kassia Yanosek


Advises global energy clients on adapting to fundamental disruption and emerging growth opportunities, leveraging nearly 20 years of strategy and principal investment experience across the oil and gas, chemicals, and power sectors

Kassia leads McKinsey’s strategy work within the Oil & Gas Practice in the Americas. She has extensive experience in serving international energy executives on industry-shaping issues. Her passion lies in helping energy companies adapt to disruption by entering new markets, scaling innovations, and collaborating with industry leaders.

Kassia’s client work spans portfolio strategy, capital project delivery, organization, mergers and acquisitions, and technology innovation. She advises international and national oil companies, exploration and production independents, and service providers across multiple geographies, primarily in the Americas and Europe. Kassia also coleads McKinsey’s knowledge partnership with the World Economic Forum on industry collaboration.

The following activities are examples of her recent client work:

  • advising a leading global energy company on transforming its organization and delivering major projects to adapt to industry disruptions
  • leading a growth-strategy initiative that included expansion to international markets for the exploration arm of a national oil company
  • developing a market-entry strategy for the oil and gas business unit of a global engineering company
  • assessing a capital-project strategy for monetizing offshore gas for an independent exploration company

Kassia was recently recognized as a Top 50 Most Powerful Women in Oil and Gas by the National Diversity Council. Prior to joining McKinsey, Kassia founded an energy investment and advisory firm and was a private equity investor in energy companies.

Kassia has published articles in Foreign Affairs and elsewhere on energy topics. In 2005, she served in the White House as an advisor on energy and economic policy at the National Economic Council and National Security Council.

Published work

The energy transition capital of the world: Houston’s opportunity to win by catalyzing capital formation,” McKinsey & Company, October 2022

How the Gulf of Mexico can further the energy transition,” McKinsey & Company, September 2022

Oil and gas after COVID-19: The day of reckoning or a new age of opportunity?,” McKinsey & Company, May 2020

How women can help fill the oil and gas industry’s talent gap,” McKinsey & Company, October 2019

Unlocking future growth for deepwater in the Gulf of Mexico,” McKinsey & Company, July 2018

A framework for fostering effective energy transitions,” McKinsey & Company, April 2018

The Next Energy Revolution: The Promise and Peril of High- Tech Innovation,” Foreign Affairs, July/August 2017

New concepts, approaches help bring deepwater projects to FID,” Offshore, July 2017

Three game changers for energy,” McKinsey Quarterly, April 2017

Taming the Mad Dog: Making oil projects work in a low-price environment,” McKinsey & Company, April 2017

Mergers in a low-oil-price environment: Proceed with caution,” McKinsey & Company, May 2016

Cheap Oil Won't Kill Exploration: How Companies and Countries Can Make the Most of Low Prices,” Foreign Affairs, February 2015

Navigating in deepwater: Greater rewards through narrower focus,” McKinsey & Company, January 2015

Past experience

Tana Energy Capital
Founding principal


Strategy manager

Financial analyst


Stanford University, Graduate School of Business

Harvard University, Kennedy School of Government

University of Virginia
BA, government