For some time he was an associate professor at the Nikolai Pavlovich Higher Institute of Fine Arts [bg].
Together with Svetlin Rusev he participated in the selection and purchase of paintings at the National Gallery for Foreign Art.
[citation needed] He made scientific publications in the fields of aesthetics, art history, and culturology.
The famous Bulgarian literary critic Boris Delchev [bg] called Raynov "a scoundrel and high-class polemicist", "a cannibal", and "the right hand of the cult and its striking force, one of Zhendov's moral assassins" in his diary.
[7] Radoy Ralin gave him the famous nickname "Guess Numerainov" (Bulgarian: Погодил Номерайнов).[8][why?]