Composer Andrey Valeryevich Semenov (Semyonov) was born in 1972 in the city of Tyumen, Russia. In 1987 he completed eight grades of Intermediary School and a degree in Junior Music School (majoring in Piano) named after S.I. Taneyev in the city of Vladimir. In 1991 he completed a degree at the Musicological Department of Moscow Conservatory Junior Music College, in 1998 — a degree at the Composition Department of Moscow Conservatory, with academic distinction; he also completed two years of assistantship there, specialized in music composition, in 2000. Andrey Semenov's teachers are composers Gennady Gladkov, Aleksey Nikolayev, , and Yuri Fortunatov.

Among Andrey Semenov's works are nine operas and a cycle 27 Operas by Andrey Semenov (mini-operas), over 30 musicals and operettas, two symphonies, various orchestral pieces, concertos for various instruments with orchestra, chamber music, sonatas, three string quartets, Hoir Concerto, cantatas, vocal cycles, songs, indicidental music for over 30 plays. Andrey Semenov's music is regularly performed in concerts and has been released on CDs. He also wrote two books, "Gennady Gladkov. The Book About A Cheerful Composer" and "Practical Advice on Working in Folklore Expedition".

Music by Andrey Semenov was performed by Russian National Orchestra, State Academic Symphony Orchestra 'Evgeny Svetlanov', St. Petersburg Philharmony Academic Symphony Orchestra, Novaya Rossia and Russkaya Philharmonia symphony orchestras, Russian State Cinematography Symphony Orchestra, Moscow Symphony Orchestra, Symphony Orchestra named after Sergey Prokofiev, Bolshoy Thratre Wind Quintet, RNO String Quartet, Sirin Ecclesiastical Music Ensemble, Moskova Chamber Chorus, Voskhod music-choral school for children etc. In different years, Andrey Semenov's music was performed by Vladimir Jurowski, Vladimir Ponkin, Sergey Skripka, Evgeny Bushkov, Anatoly Kremer, Dmitry Jurowski, Stanislav Kochanovski, Nazar Kozhukhar, Tatiana Porshneva, Natalya Kovalevskaya, Natalya Voinova, Denis Shapovalov, Oleg Vedernikov, Olga Kalinova, Ilya Ivanov, Elena Evtyukova, Alexey Sizov, Alexey Bogorad, Maxim Rubtsov, Vladislav Lavrik, Andrey Lokalenkov, Arkady Shilkloper, Andrey Kharlamov, Alexey Volkov, Leonid Drutin, Igor Grishkin, Andrey Nikitin, Irina Popova, and other famous musicians; among singers are: Tatiana Monogarova, Olga Shalaeva, Irina Dolzhenko, Svetlana Varguzova, Elena Ionova, Elena Zaytseva, Ekaterina Kichigina, Natalia Kreslina, Svetlana Krinitskaya, Lolita Semenina, Ekaterina Scherbachenko, Alexandra Grishkina, Tatiana Tavachuk, Oksana Lesnichaya, Valentina Tolkunova, Marina Kapuro, Vyacheslav Voinarovsky, Steven Richardson, Evgeny Polikanin, Yury Vedeneyev, Maksim Mikhailov, Mikhail Boyarsky, Pyotr Borisenko, Alexey Kosarev, Mikhail Urusov, Vadim Zaplechny, Alexander Tsilinko, Vladimir Ognev, Leonid Serebrennikov, Oleg Shagotsky etc.

Operas and musicals by Andrey Semenov produced by 'Moscow Operetta' State Academic Theatre, musical theatres in St.Petersburg, Novosibirsk, Krasnodar, Omsk, Irkutsk, Magnitogorsk, Samara, Saransk, Ivanovo and many other cities. For many years Andrey Semenov wrote children's musicals for New Year festivities in the State Kremlin Palace in Moscow. He wrote incidental music for many dramatic theatres, among them are Hermitage, Satirikon, Moscow Academic Theater of Satire, Moscow State Variety Theater, Romen (Gypsy Theater), Shadow, Tsaritsyno, theaters of Omsk, Norilsk, Saratov, Novokuznetsk and other cities. Among the stage directors who collaborated with Semenov are: Mikhail Levitin, Yuri Lyubimov, Andrey Goncharov, Anatoly Vasilyev, Mark Rozovsky, Alexander Gorban, Valery Arkhipov, Leonid Eidlin, Yury Eryomin, Mikhail Kislyarov, Boris Milgram, Alexander Shirvindt, Ilya Epelbaum, Alexander Kanevsky, Yuri Vasilyev, Vladimir Orenov, Alexander Yeshanov, Ilya Vorobyov, Vladimir Khotinenko, Stanislav Mitin, Alexander Zhigalkin, Igor Ugolnikov.

Since 1993 Andrey Semenov is in charge of the musical department of Moscow theater Hermitage, where he also had his debut as a dramatic actor. For many years the composer also worked as a pianist at the Moscow Art Academic Theatre named after Maxim Gorky, as well as a conductor at the Moscow Academic Theater of Satire (in 2008–2012 — a Chief conductor), as an actor at the Moscow theater Shadow. He also had a position of a production director of performances at the 'Moscow Operetta' State Academic Theatre, Moscow Academic Theater of Satire, Novosibirsk State Academic Opera&Ballet Theatre, Adygea Chamber Musical Theatre named after Adam Khanakhu. For many years Andrey Semenov is a musical director of the Andrey Mironov Festival of Actor's Song. Since 2016 he works as a conductor at the 'Moscow Operetta' State Academic Theatre. Since 2021 Andrey Semenov is a teacher at the Borodin Music School (composition class, piano class, theater class), artistic director and chief conductor of the 'Svetofor' children's variety and symphony orchestra.

Andrey Semenov has been participating in many guest performances and concerts in Germany, France, America, Israel, Denmark, Finland, Italy, Spain, Czech Republic, Belgium, Poland, Brazil, Columbia, Ecuador, Japan, Korea, and China. Besides, for over ten years Andrey Semenov participated in folkloric expeditions organized by Folk Creativity Studio in Moscow Conservatory. In this capacity Andrey has worked in Altay, Arkhangelsk, Astrakhan, Belgorod, Volgograd, Kursk, and Lipetsk regions.

Andrey Semenov is Honored Artist of Russia, Moscow Government Prize Laureate, Laureate of Golden Mask, Harlequin, and Golden Harlequin Prizes, Laureate of several composers' competitions (including for the best sacred choral work, International competition for the best work for contrabass in Dallas and others), Prize Winner for Best Music at The 17th Open Russian Festival of Animated Film, Laureate of Moskovsky Komsomolets newspaper Prize for the best male role of the 1999–2000 season, Laureate of the 3rd Andrey Mironov Festival of Actor's Song (four different prizes), Laureate of 4th Festival Dramatic Artists Are Singing in Nuzhny Novgorod, winner of the Russian Authors' Society Honor Award "For contribution to the development of science, culture and art" for 2013, member of Composers' Union of Russia, member of Union of Theater Activists of Russia, member of Composers' Guild.