He co-founded Work Service, the biggest Polish employment agency and served as a senator, representing Civic Platform.

[citation needed] On October 8, 2019, the Extraordinary General Meeting of Shareholders dismissed Misiak from the Supervisory Board of Work Service.

It turned out that the event cost nearly 4 million Polish złoty,[vague] and the organizers were unable to account for 250,000 zł before the Supreme Audit Office.

[6] He was accused of a conflict of interest since he was the chairman of the Senate Committee on Economy, which had worked on the legislation regarding liquidation of shipyards in Gdańsk and Szczecin which made the contract possible.

[14] In October 2022, Misiak was one of four people detained by the Central Anticorruption Bureau and the Central Investigation Bureau of Police in a large-scale operation related to a multi-year investigation into fraud and extortion of over 32 million zł from the State Fund for Rehabilitation of Disabled Persons and the Social Insurance Institution between 2010 and 2019.

[15][16] Misiak was charged with managing a criminal group, money laundering, defrauding public funds, large-scale fraud, committing crimes against workers' rights, and making false statements in documents.

[17][18][19] On 14 November 2022, the court found a high probability of the accused committing the alleged acts and applied a series of preventive measures against Misiak, including passport confiscation,[20] property guarantee, police supervision, and a ban on leaving the country.