Maciej Pach graduated from the Jagiellonian University (master’s degree in law, 2012) and Tischner European University in Kraków (bachelor’s degree in international relations, 2009). He was awarded the 1stprize in the „Przegląd Prawa Konstytucyjnego” (“Constitutional Law Review”) competition for the best master thesis on constitutional law and political systems defended in the academic year 2011/2012. In 2023 he defended his PhD thesis entitled „Organizacja władzy w obszarze polityki zagranicznej jako element racjonalizacji systemu parlamentarnego Republiki Federalnej Niemiec i Rzeczypospolitej Polskiej” (“Organisation of Power in the Field of Foreign Policy as an Element of Parliamentary System’s Rationalisation of the Federal Republic of Germany and the Republic of Poland”), written under the supervision of Professor Krzysztof Wojtyczek. For this PhD thesis Maciej Pach was granted the doctoral degree (summa cum laude). From 2017 to 2019 he was an assistant professor in the Department of Constitutional Law, in 2020 in the Chair in Comparative Constitutional Law of the Jagiellonian University, and from 2023 to 2025 again in the Department of Constitutional Law of the JU. He also worked in the Office of the Commissioner for Human Rights (2022–2025).

His research interests in the field of constitutional law include: the concept of militant democracy, the principle of separation of powers, governmental systems, comparative constitutional law, German constitutional law, and constitutional review. His scientific achievements encompass numerous articles in prestigious scientific journals, contributions in joint publications and papers presented at domestic and international scientific conferences, including two conferences at the University of Vilnius (2013, 2014) and the annual ICON-S Conference on public law (Madrid, 2024). He was a co-investigator in the research project „Teoria argumentacji a rozumowania prawnicze w konstytucyjnym państwie prawa” (“Theory of argumentation and legal reasoning in the constitutional rule-of-law state”) financed by the National Science Centre (OPUS; nr: 2015/17/B/HS5/00457; principal investigator: Dr habil. Andrzej Grabowski, Department of Legal Theory). Currently he works in the Poznan Centre for Human Rights as a post-doc in the project led by Dr habil. Aleksandra Gliszczyńska-Grabias, also financed by the NSC – „Demokracja walcząca: przyjaciel czy wróg demokracji w Europie? Ponowne przemyślenie stuletniej koncepcji” („Militant Democracy: Friend or Foe of Democracy in Europe? Rethinking a Century-Old Concept”, SONATA BIS 13, 2023/50/E/HS5/00442).

After 2015 he continued to work as a free journalist dealing with constitutional topics, most frequently publishing on the websites “konstytucyjny.pl” and “OKO.press”. His texts were also published by “Rzeczpospolita” and “Gazeta Wyborcza”, Polish top newspapers.