Complex sentence: In 2007, famed Israeli punk rock singer and bassist Yotam Ben-Horin (of Useless ID) started touring with Sanderson as a touring bassist, he has since also became a session bassist for Sanderson and an official member of his solo band.
Split into simpler sentences: In 2007, famed Israeli punk rock singer and bassist Yotam Ben-Horin (of Useless ID) started touring with Sanderson as a touring bassist. He has since also become a session bassist for Sanderson and an official member of his solo band.