From 2009 to 2014, Cieszyński worked at the Polish telecommunications company Orange Polska, in its finance and marketing departments.[5][1]
Cieszyński was an advisor to Mateusz Morawiecki, at the Ministry of Finance and the Ministry of Development, during the latter's time as Deputy Prime Minister from 2015 to 2017.[2][1] Cieszyński was also the head of the Department of Small and Medium Enterprises at the Ministry of Development from 2016 to 2017.[2][1] In addition, from 2016 to 2018, he served as the chairman of a board supervising a corporation that the state treasury established to support Polish export activities.[1]
On 17 January 2018, Cieszyński was appointed Undersecretary of State at the Ministry of Health, responsible for computerizing the health sector and supervising the Centre for Health Care Information Systems.[2][1] At the beginning of the coronavirus pandemic, in the middle of March, Cieszyński approved the purchase of 100,000 masks for 5 million PLN from a skiing instructor who was friends with Łukasz Szumowski, the minister of health at the time.[1] The masks were found to not meet any health standards and were deemed useless.[1] On 14 April 2020, Cieszyński completed a deal with a former arms trade company, purchasing over 1,200 ventilators for 200 million PLN.[1] The company only delivered some of the ventilators ordered, and although they were paid an advance of 154 million PLN, as of 2023, 70 million PLN of it had yet to be returned.[1] Facing criticism due to the ventilator purchase, Cieszyński resigned on 17 August 2020.[1]
