Dennis Hesseling

Dennis Hesseling currently serves as the Head of the Gas and Coal Markets Division at the International Energy Agency (IEA), taking up duties in July 2023. In this capacity, he leads the division with a focus on market analysis, security of supply and policy advice.

From December 2012 to June 2023, Mr. Hesseling was the Head of the Infrastructure, Gas & Retail Department at the EU Agency for the Co-operation of Energy Regulators (ACER). During his tenure at ACER, he directed its activities in the areas of energy infrastructure, gas markets and energy retail and also represented the Agency at the Energy Community Regulatory Board. Before working at ACER, he served as the Head of Unit in the Competition Department of the Netherlands Competition Authority (NMa/ACM) from 2006 to 2012 managing merger control and antitrust enforcement in the Dutch energy, telecommunications and media sectors. From 2002 to 2005, he worked for the Dutch energy regulator with a particular focus on gas market regulation. From 2000 to 2002, he worked as a management consultant for McKinsey & Company in Brussels, where he provided strategic and operational advice to postal companies and banks.

Mr. Hesseling, a Dutch national, holds a PhD in Mathematics from Utrecht University, Netherlands; he also received additional training from McKinsey & Company, the IMD Business School in Lausanne, IESE Business School in Barcelona, as well as from the Dutch Programme for Prospective Top Civil Servants.

In his international consultancy work, Mr. Hesseling has trained energy regulators and competition authorities in Romania, Bulgaria, Ukraine, Turkey and Vietnam. He has also provided advisory services to political parties in various African countries as part of democracy development programmes.