Dariusz Ciesielski is a graduate of the Executive MBA at Nottingham Trent University and Wielkopolska Business School at the Poznań University of Economics.
He completed postgraduate studies at the Faculty of Material Science of Refinery and Petrochemical Products at the Warsaw University of Technology and at the Faculty of Organization and Management at the Nicolaus Copernicus University in Toruń.
In 2005–2007, he served as Sales Director at Royal Unibrew Polska, with a responsibility for the integration of the acquired Polish breweries within the Royal Unibrew Group.
In 2007–2012, he worked with Selena Group in the capacity of Managing Director and Management Board Member of SELENA CO, responsible for business development in Europe, Central Asia, Turkey and the Middle East.
In 2012–2018, he was involved in the oil and gas sector, including the position as Executive Director for Petrochemicals Trade with PKN ORLEN S.A. At that time, he also served on boards of commercial companies as: Member of the Supervisory Board of ANWIL S.A. (2014–2018), Basell Orlen Polyolefins Sp. z o.o. (February–May 2018), Member of the Management Board of Unipetrol South Africa in the Czech Republic (2013–2015) and Member of the Management Board of the European Petrochemical Association (EPCA) on behalf of PKN ORLEN S.A. (July 2017– May 2018).
On 19 December 2018, the Supervisory Board of Selena FM S.A. appointed Dariusz Ciesielski as Vice President, Chief Commercial Officer, effective from 7 January 2019.