Agnieszka Kisielewska is a Partner and Co-Founder of Halcyon, where she leads the firm’s customs and excise practice. She is recognized as one of Poland’s foremost experts in excise, customs law, and VAT. For years, she has been advising companies on planning and securing international supply chains, supporting them in obtaining customs and excise authorizations, and representing businesses in tax and customs proceedings as well as before administrative courts.
Clients value her practical, comprehensive approach to advisory work and her ability to deliver effective, real-world solutions.
She gained her experience at leading advisory firm, from international outsourcing and the Big Four, to specialized boutiques and Poland’s largest professional brands, working with both global corporations and entrepreneurs entering the Polish market.
She also actively contributes to shaping better regulation in Poland, the European Union (including consultations on EU customs reform and speaking at the European Parliament), and beyond.
Privately, she is a happy wife, and mother of Antoni. Agnieszka loves spending time in Suwałki/Sejny Region (Poland), which she enthusiastically recommends as a destination for relaxation.
- Customs Coordinator at the Chamber of Digital Economy, re-elected for another term.
- Board Member (the 6th Board) of the Mazovian Region of the Polish Chamber of Tax Advisors.
- Member of the American Bar Association International Law Section (ABA ILS), serving as Co-Chair of the Europe Committee.
- Member and Secretary of the Global Legal Customs Association (GLCA) – a global network of customs and trade law experts.
- Expert of the Business Centre Club.
- 2025 – Ranked Leader in Excise in the “Rzeczpospolita” Tax Advisory Firms Ranking; recognized as Best Excise Tax Advisor and Distinguished Customs Advisor by Dziennik Gazeta Prawna.
- 2024 – Awarded Best Excise Tax Advisor by Dziennik Gazeta Prawna; honored by Rzeczpospolita for handling groundbreaking cases, including before the Supreme Administrative Court on the 0% excise rate.
- 2023 – Recognized as Leader in Excise by Rzeczpospolita; distinction for precedent-setting representation in excise cases.
- Medal awarded on the 30th anniversary of the Chamber of Commerce and Industry in Białystok for contributions to entrepreneurship.
Agnieszka frequently shares her expertise as a speaker, moderator, and commentator at leading international conferences and in global media:
- Karpacz, Poland – Economic Forum, 2025
- London, UK – Global Trade Review (GTR), 2025
- Yerevan, Armenia – AEO Roundtable within the Eastern Partnership, E-Logi Conference, 2025
- BBC News (live TV), BBC Scotland (live radio) – on post-Brexit negotiations, 2025
- New York, USA – ABA ILS Annual Conference, 2025
- Izbicko, Poland – National Customs & Excise Conference (2019, 2023, 2025)
- Paris, France – International Customs Conference, 2025
- Warsaw, Poland – Illicit Trade Summer School, University of Warsaw, 2024
- Dubai, UAE – International Customs Conference, 2024
- Geneva, Switzerland – WTO Public Forum, 2022
- Bogotá, Colombia – International Customs Conference, 2022
She has been cited by leading international media including Politico, The Times, and The Guardian.
- Law graduate, University of Łódź – awarded the Professor Kodrębski Prize.
- Certified Tax Advisor since 2015.
- Fluent in Polish and English.
