He is a former Voivode of the Masovian Voivodeship (2019–2023),[3] and member of the Polish Senate and a past president of the Chamber of Physicians and Dentists.

[5] His parents married at Puszczykowo and his sisters were born in nearby Poznań in 1959 and 1961,[5] but from the age of seven he was raised in Warsaw.

[5] He belongs to the Szydłowiecki branch of the historically princely House of Radziwiłł,[1] which owned an estate at Zegrze from the 19th century.

[1] Dr. Radziwiłł worked for several years after graduation as a primary care physician in a health center, then in Warsaw's ambulance service.

He headed the Family Medicine Clinic as a non-public health care facility, and remains a practicing physician.