He is a doctor of human science, a long-standing spokesman for the Police Commander-in-Chief during the SLD (Polish Democratic Left Alliance), PiS (Polish Law and Justice party) and Platforma Obywatelska (Civic Platform) governments. He led the “Media” operations during major political, sport and cultural events in Poland. Assistant professor of the Faculty of Political Sciences and International Studies at the University of Warsaw.

He is an author of many publications and public relations training guides. He is also an expert in crisis communication. Mariusz is the winner of the prestigious award in the first edition of the “PRotony” competition. In 2012, he was awarded the “PR Lion” prize. In 2010, he was nominated “for competent and consistent building of the Police positive image” to the top three of the prestigious competition “Brief Person of 2010”.

In 2015, together with Michał Wiórkiewicz, he founded R4S.