Alexey Tikhomirov was born in Leningrad.
In 2010 he graduated from the N.A. Rimsky-Korsakov St Petersburg State Conservatory. In 2013 finished a course of the post-graduate school of the Conservatory (class of I.A. Sharapova).
From 2015 to 2019 he was an accompanist of the Mariinsky Theatre Academy for Young Opera Singers. As an accompanist, he participated in the Elena Obraztsova International Competition of Young Vocalists (St Petersburg), the International Rimsky-Korsakov Young Opera Singers Competition (Tikhvin), Lisitsian International Vocal Competition to them (Vladikavkaz), and the chamber music program of the 16th Moscow Easter Festival (2017).
Since 2019 he is an accompanist of the Primorsky Stage of the Mariinsky Theatre.
