A graduate of the Faculty of Law of the University of Adam Mickiewicz in Poznań. He completed numerous courses, including:

• Stockbroker in Warsaw under the patronage of Oxford University UK,
• Investment Advisor in Warsaw,
• Crisis Management in State Structures in Washington DC under the patronage of the Department of State USA,
• Sitting on Supervisory Boards of companies with State Treasury shareholding.

Experience:

• 1989 – 1990, Deputy Editor-in-Chief of the Młoda Polska Weekly in Gdańsk.
• 1989 – 1991, Researcher at the Faculty of Legal Sciences of the Polish Academy of Sciences in Poznań. Expert of the Parliamentary Constitutional Committee of the Sejm of the Republic of Poland.
• 1991 – 1992, Director of the office of the Minister of Interior and Administration.
• 1992 - 1993, Advisor to the Minister - head of the Central Planning Office.
• 1993 – 1996, Chairman of the Foundation Council of the Warsaw Institute of Finance and International Affairs. President of the National Financial Advisory Office "Projekt".
• 1996 – 1997, Legal advisor to the Warsaw Voivode.
• 1997 – 1998, Advisor to the Minister of Sport. Vice President of the Management Board of the Polish Tourism Development Agency.
• 1998 – 2005, Vice President of the Management Board of Orbis S.A., Director of the Orbis Academy.
• 2005, Advisor to the Minister of Transport.
• 2006 – 2008, President of the Management Board of Operator Logistyczny Paliw Płynnych.
• 2007 – 2008, Vice President of the Polish Organization of Petroleum Industry and Trade.
• 2008 – 2013, General Director of the National Financial Advisory Office "Projekt".
• 2013 – 2015, Director General of the Grosvenor House Institute for Strategic Studies. President of the Management Board of the Grosvenor House Institute for Strategic Studies.
• 2015 – present, Running my own business, economic consulting and management under the company Arkadiusz Siwko.
• 2015 – 2017, President of the Management Board of Polska Grupa Zbrojeniowa.
• 2016, Member of the Supervisory Board of ORLEN S.A.
• 2017 – 2018, Member of the Supervisory Board of Polska Spółka Gazownictwa.
• 2018, President of the Management Board of Energa S.A.
• 2017 – present Director General of the Grosvenor House Institute for Strategic Studies. 
• 2018 – 2022, Advisor to the Management Board of Deloitte Polska