He has over 25 years of experience in the financial sector. From July 2017 to June 2020, he sat on the management board of Pekao S.A., where he held the positions of the Chief Risk Officer and the Chief Executive Officer.

He worked for Bank Pekao S.A. (which in 1999–2017 was a subsidiary of UniCredit Group) for 20 years. From 2000 to 2008, he held the position of the director of the Market Risk Management office and then the director of the Financial Risk Management Department. For nearly 10 years he was responsible for global risk management functions in international structures of UniCredit Group in London, Munich and Milan.

Marek Lusztyn embarked on his professional career at Bank Handlowy w Warszawie S.A., where he worked in the Treasury and Foreign Exchange Department from 1996 to 2000.

In September 2019, he became a member of the Board of the Warsaw School of Economics (SGH). He was appointed by the SGH Senate after being recommended by the SGH Corporate Partners Club, a group of leading Polish and international companies working closely with SGH. Currently, he works there as an assistant professor at the Banking Institute.

Since June 2022, Marek Lusztyn has served as the president of the supervisory board of the Commercial Banks Institutional Protection Scheme established by the eight biggest banks in Poland in order to foster stability in the banking sector.

In 2014 he was awarded the title of Future Leader in Global Finance by the Institute of International Finance in Washington.

He holds a PhD in economics from the Warsaw School of Economics (SGH) and completed the Executive MBA programme at the University of Illinois and the University of Warsaw. He also graduated from INSEAD and holds a bachelor degree in computer science engineering. He completed a number of training courses in the area of banking and management organised, among others, by Singularity University, IMD and Stanford Graduate School of Business.