On 22 September 2010, he made his official debut for his new team in the 0–5 away loss against Borussia Dortmund after coming on as a substitute for Erwin Hoffer.

He was unable to establish himself as a regular for the team and was loaned out to FSV Frankfurt during the winter break.

On 3 February 2012, Mitsanski made his debut for FSV Frankfurt and netted two goals in the 2–1 away win over MSV Duisburg in a 2.

[4] On 6 September 2016, Mitsanski made his return to Bulgarian football after 11 years abroad as he signed with PFC Levski Sofia until the end of the season.

[10] On 11 August 2010, Mitsanski made his debut for the Bulgarian national team in the 0–1 away loss against Russia in a friendly match.

He scored his second international goal against Cyprus after coming off the substitutes bench in a friendly played on 15 August 2012.