Tomasz Bieske holds a master's degree in Economics from the University of Cologne (Germany). For six years after graduation, he worked at the head office of Dresdner Bank AG in Frankfurt, where his main responsibilities included lending to international corporate clients and trading in sovereign debt on the secondary market.  From 1988, he worked for Arthur Andersen in Frankfurt, as a Manager in charge of business consulting for financial institutions. Two years later, he moved back to Warsaw to co-found Arthur Andersen in Poland, where he served as Partner and Head of Financial Markets Group. He was responsible for working with clients from the financial sector, which included auditing the financial statements of leading banks in Poland, the sale of non-performing loan portfolios of banks, and the valuation of private banks' shares. He also participated in several due diligence processes commissioned by foreign investors and in consulting projects in the financial markets sector.
 
Following the merger of Arthur Andersen and Ernst & Young in 2002, Tomasz Bieske continued as Partner and Head of Financial Markets Group. He led the majority of key projects in the financial services sector, including the preparation of public offerings for PKO BP S.A. and Kredyt Bank S.A., as well as auditing the financial statements of the National Bank of Poland, PKO BP S.A., Pekao S.A., Getin Holding and several other banks, as well as the Social Insurance Institution (ZUS). He also led various advisory projects in the banking sector, including the development of the concept of the GPW privatisation, the preparation of an operational change plan for the Ministry of Finance, and the merger of four state-owned banks into Pekao S.A. prior to its privatisation. In 2011, he participated in the work of the committee for regulatory and business changes in the cooperative banking sector.
 
Tomasz Bieske works closely with the Polish Bank Association and the National Association of Cooperative Banks. He holds a license as a Polish statutory auditor. In 2011, he was awarded the gold medal of the Polish Bank Association for his contribution to the development of banking in Poland from 1991 to 2011. He was a member of the supervisory boards of several GPW-listed companies, including Masterlease S.A. and Kruk S.A.
 
He completed the three-month Oxford Fintech Programme in 2019 and the three-month Venture Capital Programme at the University of Oxford in 2020. Since 2019, he has been a member of the Association of Independent Non-Executive Directors. In the academic year 2023/2024, he served as a coach for students enrolled in the postgraduate course “Professional Supervisory Board” at Kozminski Academy in Warsaw.