Marian was born in 1977, in what was then the Moldavian Soviet Socialist Republic, to a family of artists. His talent was first recognized publicly in 1989, at the International Festival of Creation in Moscow, where he took the Laureate prize. In 1990, at the age of 13, Marian was awarded first prize at the Extraordinary Talents International Festival in Chisinau. Afterwards, his concert career flourished, and he also continued his singing and piano studies in Moscow and in Bucharest. Marian moved to Italy in 1999. In Rome, he studied with conductor and countertenor Flavio Colusso, and with Colusso he performed the unabridged operas of Giacomo Carissimi throughout Europe.
In 2000 Marian recorded his first album, Alia Vox. Marian is a regular guest at some of the most prestigious European music festivals. He has performed at the Festival dei Due Mondi in Spoleto, the Avignon Festival, and the Vilnius Festival. He has also performed at the Musikverein and Konzerthaus in Vienna, the Concertgebouw in Amsterdam, the Maestranz Theatre in Seville, the Oratorio del Gonfalone in Rome, the Hermitage Theatre in St. Petersburg, and the Galina Vishnevskaya Theatre in Moscow. Marian has performed as a soloist with the Clemencic Consort since 2001. Contemporary composers who have dedicated works to him include Flavio Colusso, Sergio Rendine, Carlo Crivelli, and René Clemencic.