John Dionisio Jr.

Managing Director

John brings nearly two decades of corporate, project, and sustainable development experience in Europe, Africa, and the Americas to GISI. As the MD of Corporate Development, John’s principal role focuses on corporate and strategic development initiatives including supporting organic and M&A growth plans and strategic planning initiatives. John also spearheads GISI’s approach to technology-based innovation investments as well as ESG strategies.

Prior to joining GISI, John was a founding member and partner of Meridiam SAS, a Paris headquartered investor and asset manager specializing in sustainable development, public-private partnerships, and energy transition projects.

John remains active with major industry associations, including his role as an officer and treasurer on the New York League of Conservation Voters Education Fund, an organization focused on empowering New Yorkers to make New York State the national leader in protecting the human environment. In addition, John is an active angel investor in construction and infrastructure early-stage technologies and advises numerous entrepreneurs on growth and impact initiatives.

John holds a Bachelor of Science degree from Georgetown University and a Master’s degree from Columbia University’s School of Public and International Affairs.

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