Currently, Jan Ernst Cornelis de Groot is Chief Legal & Sustainability Officer at Koninklijke Ahold Delhaize NV.

He is also on the board of JMR - Gestão de Empresas de Retalho, SGPS SA, Salzburg Global Seminar, Inc., Hermitage Amsterdam and ADG dienstengroep BV and Chairman-Supervisory Board at Wetlands International and Chairman-Supervisory Council at Stichting Hivos.

In the past he occupied the position of Principal at De Brauw Blackstone Westbroek NV, Secretary, Managing Director & General Counsel at Koninklijke Luchtvaart Maatschappij NV, Chief Legal Officer of Royal Ahold NV, Legal Director & General Counsel at TNT Express BV and Principal at the University of Leiden.