Nechayev's career as director was launched in 1974 with a film called The Adventure in a Town That Doesn't Exist. He was also the creator of the popular musical fairy tales About The Little Red Riding Hood and The Adventures of Buratino (1975 film). He was a prolific director at the studio Belarusfilm, where he worked for 17 years and shot 10 films. The Minsk Museum of Cinema has a hall exclusively dedicated to his creative legacy.