In 1988, Jacek Michalak graduated from the Faculty of Economics and Sociology of the University of Łódź, majoring in Finance and Banking. During his professional career, he completed training courses at renowned European business universities, including INSEAD, IMD and ESADE. In 2002, he completed the INSEAD International Management Program and obtained the status of “INSEAD alumni”.
In 1992–1995, he worked for Huhtamaki, Leaf Poland as Financial Director, and in 1995–1998, served as Financial Controller with for PepsiCo, Wedel S.A. Subsequently, in 1998–1999, he worked for Pepsico Frito Lay, London as Planning Manager for the EMEA region, and in the years 1999–2000, held the role of Regional Controller for Eastern Europe in Pepsico Frito Lay.
Next, he was Financial Director and member of the Management Board at Carlsberg Poland (Okocim S.A.), Carlsberg UK of Northampton and Carlsberg Shared Service Center, Poznań, where he also served as General Manager.
In 2011–2012, he worked for Petrolot, Warsaw, as Financial Director. In 2012–2019, he was Financial Director at ZT Kruszwica S.A. and a member of the company's Management Board.
In accordance with the resolution of the Supervisory Board of Selena FM SA, on 24 June 2019 he was appointed as Management Board Member, Chief Financial Officer (CFO) of Selena FM SA, effective on 1 July 2019.