1. Specialist Medical Practice-Pathologist; Non Public Health Care Unit; Department of Pathology (NZOZ Zakład Patologii Spółka z o.o.); Kielce Poland
2. Board Member and General Secretary of Information and Organization Centre for the Research on the Public Finances and Tax Law in the Countries of Central and Eastern Europe; Faculty of Law; Department of Law of Public Finances; University of Bialystok; Bialystok Poland
3. Department of General Pathomorphology; Medical University of Bialystok; Bialystok Poland