Myśliwiec played football at amateur level, before moving to Kraków to attend university. After completing his studies in 2009, he became a player-manager of Klasa A club Strzelec Frysztak. Myśliwiec was remembered in Frysztak for a level of commitment and preparation unusual for amateur level football, conducting in-depth tactical and set-piece training, giving pre-match debriefs, as well as procuring pre-match clothing for his players, and, when necessary, maintaining the pitch.[1]
He left the team in December 2010 to intern as a coach for Escola Varsovia Warsaw, before joining Legia Warsaw's academy in 2011. After five years with Legia's youth teams, he joined their senior technical staff as a match analyst in 2016. On 28 July 2017, he moved to Górnik Łęczna to operate as an assistant in Tomasz Kafarski's staff, later working with head coaches Bogusław Baniak and Sławomir Nazaruk.[2] In 2018, he took on the same role at Chojniczanka Chojnice, working under Przemysław Cecherz and Maciej Bartoszek.[3]
Lechia Tomaszów Mazowiecki
On 29 December 2018, he took on his first professional managerial role when he took charge of III liga club Lechia Tomaszów Mazowiecki. He managed the team in 17 league games, winning nine times, drawing and losing four games each, before leaving at the end of the season to join Jacek Zieliński's staff at Arka Gdynia as an assistant.[4]
After leaving Arka on 31 October 2019,[5] Myśliwiec rejoined Lechia the following day on a six-month contract. After just five matches in charge, the III liga season was suspended indefinitely on 12 March 2020 due to the COVID-19 pandemic,[6] and he left the club at the end of his contract.[7]
Despite short stins, Myśliwiec left a good impression in Tomaszów Mazowiecki; he was later remembered by former Lechia players for a similar level of commitment that he had previously shown in Strzelec; servicing the pitch, hosting thorough one-on-one talks and introducing mandatory nutrition for both senior and youth players.[1] On 16 September 2023, when visiting Lechia to observe Widzew's upcoming opponents, Concordia Elbląg, he was greeted by the club management and former underlings, while home fans chanted his name during the game.[1]
Wólczanka Wólka Pełkińska
On 4 July 2020, III liga club Wólczanka Wólka Pełkińska announced the appointment of Myśliwiec.[8] At the end of his tenure, Wólczanka was placed 5th in their group with 11 wins, 3 draws and 6 losses.[1]
Stal Rzeszów
On 19 December 2020, Myśliwiec moved to II liga club Stal Rzeszów.[9] In his second season in charge, he led Stal to a league title and promotion to I liga.[10]
After finishing the 2022–23 campaign in 6th and losing in the first round of promotion play-offs, Myśliwiec announced he would be leaving the club at the end of the season.[11] He terminated his contract by mutual consent on 14 June 2023.[12]
Shortly after his departure from Stal, he joined Legia Warsaw's staff for their pre-season camp.[13]
Widzew Łódź
On 5 September 2023, Myśliwiec signed a two-year deal to become manager of Ekstraklasa club Widzew Łódź, replacing the outgoing Janusz Niedźwiedź.[14] On 17 September, Widzew defeated Cracovia with a 2–0 scoreline in Myśliwiec's first game as manager.[15]
