Doctor of Psychiatry at the Medical University of Warsaw; Head of the Clinic of Psychiatry; Head of the EEG Laboratory and Sleep Research. Since 1998 he has been managing the Sleep Disorder Treatment Clinic (the first of its kind in Poland). Since 1991 he has been working as an adjunct at the Medical Academy in Warsaw. Author and co-author of over one hundred publications. He is the secretary and member of the commission for combating depression at the Ministry of Health. For five years as an expert he participated in the WHO project – Night Noise Guideline, which ended with the publication of a report recommending the EU.