Before taking on his first managerial role, Kroczek worked as a coach for UKS SMS Łódź and the Łódzkie Football Association team, and attended internships at Benfica, Karpaty Lviv, Southampton, Zagłębie Lubin, Cracovia, Lechia Gdańsk, Sandecja Nowy Sącz and Valencia.
[1] In mid-2019, he was appointed manager of III liga club Sokół Aleksandrów Łódzki, and led the team to 17 wins and 12 draws in 36 matches, before leaving in December 2020 to join Resovia's staff as an assistant coach under Radosław Mroczkowski.
[2] On 29 September 2021, after Mroczkowski's dismissal, Kroczek took on the role of manager,[3] which he held until the end of the season, which Resovia finished in 11th.
[7] However, after Jacek Zieliński's sacking following a 2–2 league draw against ŁKS Łódź on 5 April 2024, Kroczek was promoted to the role of interim manager until the end of the campaign.
[9] On 23 May 2024, the club announced that Kroczek had signed a contract to become a full-time manager of Cracovia until 30 June 2025, with an option for a further year.