Polish political scientist and politician holding a PhD in security sciences and serving as an academic lecturer.

In 2010, he was re-elected in the local government elections and assumed the role of chairman of the PiS councillors' club that same year.

On 18 November 2015, Jaki became Secretary of State in the Ministry of Justice[4][5] responsible for, among other things, supervision over the Prison Service.

[7] He drafted an amendment to the existing law to prohibit depriving parents of the right of custody of their children on grounds of their bad financial situation.

[8][9] He has been entrusted with oversight over the establishment of the Museum of Cursed Soldiers and Political Prisoners of the Polish People's Republic.

[21][22] On 11 October, Jaki received the "Polski Kompas" (Poland's Compass)[23] award granted by the Gazeta Bankowa monthly for his "fight against a reprivatisation mafia".

[25] He is responsible for the "Save the Heroes" campaign promoting the restoration of streets named in honor of generals Emil August Fieldorf "Nil" and Zygmunt Szendzielarz "Łupaszka”, as well as the legislation initiative "Let's Restore History Lessons at Schools”[26] On 14 September 2013, Jaki married Anna Kuszkiewicz (in Cathedral Basilica of the Holy Cross, Opole).