He graduated from the Kiril Popov Mathematics school in Plovdiv, after which he obtained an Engineer's degree in telemechanics from the Georgi Benkovski Higher Airforce Institute in Dolna Mitropoliya.

His scientific and applied publications have been translated into Arabic, Armenian, Bahasa, Georgian, Dari, Spanish, Portuguese, Romanian, Russian, Serbian, Ukrainian, Hungarian and French.

Tagarev was first appointed as the Minister of Defense by President Rosen Plevneliev on 13 March 2013 as part of the Caretaker Government of Marin Raykov.

[4] During an emergency briefing at the Parliamentary Defense Committee, Tagarev confirmed that the drone was "most likely" connected to the Russian invasion of Ukraine, being marooned to the coast of Bulgaria after an estimated 2 weeks of being downed.

[7] The opposition parties (Vazrazhdane, BSP, ITN) called on Tagarev to resign, accusing the MoD of a slow reaction time and a lack of professionalism.

[12] During Yordanov Day, traditionally held on the 6th of January, it is customary for a blessing of the Bulgarian Armed Forces battle banners to take place, under the supervision of the President, Cabinet Ministers, Members of the Committee for Defense and National Security and Chairs of the Parliamentary Groups.

[17] BSP MP, Borislav Gutsanov, claimed that this was "another example why this person is a threat to our country's national security" and called on Tagarev to resign.