In 1994, he graduated from the Faculty of Law of the Jagiellonian University, and then he completed a prosecutor's apprenticeship at the District Prosecutor's Office in Tychy. After completing his apprenticeship in 1996, he worked at the District Prosecutor's Office in Sosnowiec as: assessor and (since 1998) prosecutor. Between 2001–2005 he was a prosecutor of the District Prosecutor's Office in Katowice.
From 2003–2005 he served in the Division VI for Combating Organized Crime. In November 2005, he started working in the National Public Prosecutor's Office, where he was the deputy director and director of the Organized Crime Office, supervising and coordinating the most serious investigations concerning organized crime groups and crimes of a financial and economic nature.[2]
On September 13, 2006, he was appointed acting head of the Internal Security Agency, and on October 19, 2006, head of the Internal Security Agency. He was dismissed from this function on November 2, 2007. Restored to the position of a public prosecutor of the National Public Prosecutor's Office, he retired with the liquidation of this unit and the establishment of the General Public Prosecutor's Office.
In the 2010 local government elections, as a non-party member, he was elected a councilor of the Silesian voivodship sejmik from the Law and Justice list. In the parliamentary elections in 2011, he became the leader of the PiS list to the Sejm in the Wałbrzych constituency, he obtained a parliamentary seat, receiving 17 109 votes.[3] After the elections, Bogdan Święczkowski refused to resign from the function of a retired prosecutor, therefore the Speaker of the Sejm, Grzegorz Schetyna, terminated his parliamentary mandate, considering that the law prohibits combining these two functions. Bogdan Święczkowski appealed against this decision to the Supreme Court, which dismissed the appeal. On November 14, 2011, the Sejmik of the Silesian Voivodeship expired his mandate as a councilor of this chamber. In January 2012, his complaint against this decision was rejected by the Provincial Administrative Court in Gliwice.[4] In the same year, Bogdan Święczkowski supported the creation of United Poland.
On November 24, 2015, he was appointed Undersecretary of State in the Ministry of Justice. On 7 March 2016, he was appointed to the position of the national prosecutor and the first deputy prosecutor general.
In 2019, he took the position of the chairman of the Scientific Council established by the Minister of Justice of the Institute of Economic and Financial Expertise in Łódź.
On January 26, 2022, he was nominated as a judge of the Constitutional Tribunal. On February 8, 2022 the Sejm elected him as Judge.[5] On February 16, 2022, he took the oath before the President of the Republic of Poland Andrzej Duda.[6]
