An attack-minded right-back, Mihail spent almost his entire 17-year professional career playing for Sportul Studentesc Bucharest in the top tier of Romanian football (SuperLiga).

[1] Mihail began his senior career in 1975, at the age of 17, playing as a winger for his hometown club Brasov FC,[2] in the second tier of Romanian football, making 24 appearances and scoring 8 goals.

[9][10] Mihail was part of Romania national team squad for the successful UEFA Euro 1984 qualifying campaign, but he was not selected for the final tournament held in France.

[39] In September 2016, Mihail moved back into club coaching as manager of Iraqi top flight side Zakho SC, on a one-year contract.

[41] In January 2017, Mihail announced his decision to leave Zakho SC due to sectarian unrest in the country,[42] and was replaced by another Romanian manager, Dorinel Munteanu.

[43][44] In December 2017, Mihail was named the new manager of Vietnamese top flight side FLC Thanh Hóa, replacing Ljubomir "Lupko" Petrović of Serbia.

[45][46] His first competitive match as manager of the team was on 23 January 2018, when FLC Thanh Hóa defeated hosts Eastern AA of Hong Kong 4-2 in the second qualifying round of the 2018 AFC Champions League.

[56][57] Under Mihail's guidance, PSS Sleman made a good start to the 2023-24 BRI Liga 1 season with a 1-0 win away to Bali United,[58][59] the representative of Indonesia at the 2023-24 AFC Champions League, followed by a 2-2 draw at home with neighbors and rivals Persis Solo.

[60] In February 2024, Mihail has signed a one-and-a-half-year contract as manager of United City FC (formerly Ceres-Negros),[61][62] the most successful club in Filipino football, with four consecutive titles.

[65] A few months later, United City FC has officially announced their withdrawal from the 2024-25 Philippines Football League season due to financial issues, and all players were released from their contracts immediately.