Tax advisory for companies in the energy sector.
Tax advisory for FMCG companies.
Tax advisory for companies in the manufacturing industry.
2005-2010 — Deloitte Tax Advisory Services
2011-2013 — TaxOptima
Since 2014 — Porwisz and Partners
Faculty of Law and Administration, Jagiellonian University
"Tax on civil law transactions. Practical Commentary.", CH Beck Publishing House, Warsaw 2013 (co-author)