Frederik Johnsen is Chief Executive Officer and Chairman of the Management Board at JAO. Having joined the organisation in 2008, he has played a central role in building JAO into Europe’s single allocation platform for cross-border transmission capacity markets.

As CEO, he leads JAO’s strategic direction as a neutral one-stop shop delivering secure, transparent and reliable energy market services across Europe. Under his leadership, JAO continues to strengthen market integration, support effective regulatory implementation and contribute to Europe’s energy transition.

Frederik fosters collaboration between transmission system operators, market participants and regulators, ensuring JAO remains a trusted ecosystem integrator connecting stakeholders and enabling an equal, open and efficient electricity marketplace.

As Chief Operating Officer and member of the Management Board, Thomas Kieffer leads JAO’s operational and technology functions, ensuring the consistent delivery of high-quality services supporting Europe’s cross-border electricity markets.

Drawing on extensive leadership experience in financial services and market infrastructures, he drives operational excellence, system reliability and continuous improvement across JAO’s platforms and services. His focus is on maintaining resilient, secure and scalable operations that enable seamless market functioning across borders.

Through a strong commitment to quality, security and performance, he ensures JAO’s services remain dependable, adaptable and aligned with the evolving needs of TSOs and market participants.

Annick Winandy joined JAO as Chief Financial Officer in April 2026 and serves as a member of the Management Board, responsible for financial strategy, governance and corporate stewardship.

With over 15 years of international experience in transaction advisory and financial leadership, she supports JAO’s role as a neutral, non-commercial market infrastructure organisation. She ensures transparent financial management, robust governance frameworks and sustainable resource allocation underpinning JAO’s trusted marketplace.

As CFO, she strengthens financial integrity and long-term organisational stability, enabling JAO to continue delivering efficient, secure and fair services that support European electricity market integration.