John Mennel

Pioneer
DISC Type : ids

Board Member at Net Impact

Arlington, Virginia, United States

Overview

John is a Strategy Partner at Deloitte, leading the firm’s global Sustainability and Clean Tech practices. He focuses on decarbonization, clean power, and bringing low-carbon solutions to market using AI and data. People who have worked with him describe him as intelligent, diligent, and positive. He holds an MBA from Harvard and a BA from Brown University.

John dedicates his personal time to social and environmental causes, serving as a board member for both Net Impact and the YMCA of the Rockies. An avid backpacker, he is passionate about the outdoors and completed a through-hike of the Colorado Trail in 2023. His international career began in Moscow during the perestroika period.

Unique fact: His professional headline simply reads, "Earthling. "

Personality Overview

Driven But Considerate

Decisive But Friendly

Dynamic But Sincere

They combine a unique set of diverse traits where they are fast and friendly but can slow down to be thorough when needed  If they are convinced, they can become very strong champions for your product They have the unique ability to win both love and respect from their team (or outsiders)

Topics They Care About

AI in Energy
His recent speaking engagements and posts focus on deploying AI to improve grid resilience, operate more effectively, and transform the energy system.
Clean Tech Solutions
He is a leader in Deloitte's Clean Tech practice and his recent focus has been on tangible clean baseload solutions like nuclear and geothermal power.
Decarbonization Strategy
For over a decade, his work has centered on helping large companies develop and implement plans to decarbonize their operations and commercialize abatements.

Media Appearances

Achieving Sustainability-Driven Growth with John Mennel of Deloitte. Featured in Impact Podcast

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Helping Businesses and Investors Achieve Sustainability Goals with John Mennel of Deloitte. Featured in Impact Podcast

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Video Quick Take: Deloitte’s John Mennel on How Purpose Delivers Corporate Value. Featured in Harvard Business Review (Sponsored)

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Work History

2-2026
Board Member at Net Impact
4-2022
Board Member at YMCA of the Rockies
8-2011
Managing Director at Deloitte
7-2004 - 7-2011
Senior Associate at Booz Allen Hamilton
2003 - 2004
Director Product Marketing at Traq-wireless

Education

1-1997 - 6-1998
MBA from Harvard Business School
8-1988 - 5-1992
BA from Brown University

More Information

Social Presence :

Prographics :

Exp : 33 Location : Arlington, Virginia, United States Job Level : Mid-senior Designation : Board Member at Net Impact
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Insights For Selling To John

During A Call Or A Meeting

DO's

  • Ask them for a lunch or coffee once some rapport has been established
  • Build a trustworthy relationship while keeping the product center-stage
  • Mostly stick to your standard pitch and qualifying script, but add some stories or anecdotes to it

DONT's

  • Don’t be very informal during the early interactions even if they are being so themselves
  • Don't lean very heavily into providing too much information, sharing whitepapers etc.
  • Avoid focusing only on the product or its ROI, keep building trust subtly

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with John is

  • Nothing less than a strong combination of proof of results, relationship and high levels of professionalism is effective with them.
  • Will you ever get a clear answer from John

  • They can say no while staying friendly, but can also be pursuaded to reconsider

Insights For Deal Planning

    How fast (or slow) will John move?

  • They are generally fast movers and can take quick decisions
  • Can John take some risk or not?

  • They have high risk-appetite but can get ahead of themselves once in a while. Observe carefully

You And John

Personality Compatibility


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