From ambition to measurable outcomes

At GG Advisory, we believe meaningful change happens when strategy meets execution.
Founded by Antonin Demazy de Fortet, a strategy and energy-transition consultant with over two decades of international experience, GG Advisory was created to bridge the gap between ambition and measurable outcomes.

Our journey began with a simple conviction — that organisations striving for sustainability, decarbonisation, and impact-driven growth deserve practical, credible pathways to get there. Having delivered large-scale transformation programs across Europe and Asia-Pacific for Fortune 500 companies, governments, and innovative start-ups, we know that success relies on clarity, collaboration, and accountability.

Today, GG Advisory partners with businesses and innovators to accelerate the energy transition, enhance ESG performance, and prepare sustainable tech ventures for investment.
Our values — integrity, impact, and innovation — guide everything we do. We combine strategic insight with hands-on delivery, helping clients navigate complex transitions with confidence and purpose.

Together, we design solutions that are data-driven, future-ready, and built to last. tailored technical solutions and operational execution. Together, we create a lasting impact that drives growth and innovation.