In 1987–1992, Roman Kusz studied at the Faculty of Law and Administration of the University of Silesia in Katowice. Between 1993 and 1997, he completed his legal training as an attorney-at-law at the Regional Bar Association in Katowice. He has run his own law practice since 1997.

First in 2007–2013 and then since 2016, he has served as Dean of the Regional Bar Association in Katowice.

He has been a Member (since March 2014) and Chairman (since January 9th 2017) of the Supervisory Board of Górnik Zabrze S.A. of Zabrze. During the 2018/2019 term of office, he also served as Secretary of the Supervisory Board of Ekstraklasa S.A. of Warsaw, the company organising the top Polish professional league for men’s football teams.

Since 2017, he has sat on the Supervisory Board of the Provincial Fund for Environmental Protection and Water Management in Katowice.

In 2019–2020, he was a Board Member at the University of Economics in Katowice.

Chairman of the 2nd term of the Silesian Forum of Self-Governments of Public Trust Professions in 2018.

Since 2014, he has organised and moderated legal panels at the European Economic Congress in Katowice.

On behalf of the Polish Bar Council, in his capacity as Chairman of the External Image and Legal Protection Committee, he co-organised the ‘Advancing Law & Governance Contributions to Climate Action under the Paris Agreement’ panel, which was part of the UN Climate Change Summit COP24 – the 24thConference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) held in Katowice, in 2018.