[1] His parents were born in Germany and worked, just like his brothers Nicolai and Alexej, as professional musicians.
After earning his bachelor's degree in at the University of Music and Theatre Leipzig, he began studying jazz-cello at the Hochschule für Musik, Theater und Medien Hannover with Stephan Braun [de].
He was also a guest at the Schleswig-Holstein Musik Festival, the Festspiele Mecklenburg-Vorpommern, Münchner Symphoniker, Kozerthausorchester Berlin, Heidelberger Frühling, Gezeitenkonzerte in Ostfriesland, Bergische Symphoniker, Neubrandenburger Philharmonie and Musicfestival The Next Generation III.
Piano being the biggest inspiration, his compositions' style vary from Bebop, over Blues and Program music.
Gerassimez likes to explore different sounds and techniques on the cello as he often uses it as a jazz guitar or percussion instrument in his own works.