Mariusz Haładyj is a state official and an attorney-at-law. He graduated from the Faculty of Law at the Catholic University of Lublin and the post-graduate studies - Company law at the University of Warsaw. He also completed the solicitor’s training at the Warsaw Bar Association of Attorneys-at-Law. He specialises among others in contract law, tort law, energy law, public procurement and public economic law.
Mariusz Haładyj got familiar with practical aspects of auditing when he was a member of audit teams which revealed severe irregularities in managing public property. In 2003, he started to work at the Department of Economy, State Treasury and Privatisation of the Supreme Audit Office of Poland where he completed the auditor traineeship programme and then worked at the Treasury Audit Department of the Ministry of Finance, first as a chief specialist, then as the Head of the Department for Audit of Public Funds. Since 2008, he was a section head at the Ministry of Economy and since 2009 he was the deputy director responsible for the departments of economic and financial law.
In 2012-2019, Mariusz Haładyj was an undersecretary of state at the Ministry of Economy, later transformed into the Ministry of Development and the Ministry of Entrepreneurship and Technology. He was responsible e.g. for developing economic regulations which improved legal environment for entrepreneurs and for shaping the system of the Regulatory impact analysis and public consultations.
In 2017-2019, he served as the deputy chair of the Chief Adjudicative Board dealing with violations of public finance discipline and a member of the Polish Financial Supervision Authority (2018-2019). In February 2019, he was appointed President of the General Counsel to the Republic of Poland where he worked until he assumed the office of the President of the Supreme Audit Office of Poland in September 2025.
In the General Counsel to the Republic of Poland Mariusz Haładyj strengthened its role as a legal advisor to public entities being not only very effective in court and arbitration proceedings but at the same time getting involved in negotiations and extrajudicial settlement of disputes. He developed the activity of the Court of Arbitration at the General Counsel to the Republic of Poland and contributed to a significant increase in the number of legal opinions issued by the General Counsel.
Mariusz Haładyj was distinguished by the President of the Council of Ministers for merits for legislation, by the Minister of National Defence with a bronze medal for merits for the country’s defence system and by the President of the Public Procurement Office for merits for the development of the public procurement system. He was decorated for cooperation with legal services of the Ministry of National Defence. Also, he was rewarded by the National Bar Council of Attorneys-at-Law with the title of the Ambassador of Mediation and merited for the National Bar of Attorneys-at-Law.
Mariusz Haładyj is a laureate of rewards awarded by the largest organisations of entrepreneurs (Lewiatan, Employers of Poland, the Polish Chamber of Commerce, the Federation of Polish Entrepreneurs), the Ombudsman for Small and Medium-Sized Enterprises (twice), the Allerhand Institute and Dziennik Gazeta Prawna (Bona Lex, the best legal act) – for preparing laws improving the regulatory environment for entrepreneurs, listening to economic postulates, cooperation and building dialogue between the administration and entrepreneurs.
Mariusz Haładyj is married with three children.