• 1974-1978 studies at the Faculty of Law of the University of Warsaw
• 1978-1982 the Institute of State and Law at the Polish Academy of Sciences
• 1979-1981 judge traineeship concluded with judge examination
• 1982-1987 judge in the Region of the Voivodeship Court in Warsaw
• 1987 entry into the list of radcy prawni (solicitors)
• 1987-1989 legal counsellor at foreign enterprises and corporations
• 1989 entry into the list of adwokaci (attorneys)
• 1989 foundation of the legal office – Łaszczuk i Wspólnicy sp.k.
• 2006-2013 Member of the Regional Attorneys’ Council in Warsaw
• since 2006 A member of the Management Board of the Polish Arbitration Association
• 2010-2012 The Chairman of the Committee of foreign legal organisations relations at the Polish Bar Council
• 2010-2013 the Chairman of the Vocational Training Commission at the Regional Attorneys’ Council in Warsaw
• since 2011 a member of the Arbitration Council of the Polish Chamber of Commerce Court of Arbitration in Warsaw
• since 2011 An Arbitrator at the Court of Arbitration for Sport at the Polish Olympic Committee.
• 2011-2013 a member, and then the President, of the Polish delegation to the Council of Bars and Law Societies of Europe
• 2012-2013 the Chairman of the Foreign National Bar Councils Commission
• since 2013 a member of the Polish Bar Council
• since 2014 a member of the Polish Bar Council’s Vocational Training Commission
• since 2015 the Chairman of the Polish Bar Council’s Arbitration Commission
• since 2015 the Chairman of the Arbitration Council of the Polish Chamber of Commerce Court of Arbitration
• since 2015 the Vice President of the Editorial Board of “Palestra”
• since 2016 Member of the Council of the Court of Arbitration for Sport at the Polish Olympic Committee.

For many years a recommended arbitrator of permanent arbitration courts.
A lecturer and author of numerous legal publications regarding, in particular, arbitration.