Complex sentence: He is the bassist for the thrash metal band Nuclear Assault and was a founding member of Anthrax with Scott Ian (Lilker was then playing lead guitar) and recorded bass guitar and co-wrote on their first album, Fistful of Metal.
Split into simpler sentences: He is the bassist for the thrash metal band Nuclear Assault. He has founded Anthrax with Scott Ian (Lilker was then playing lead guitar) and recorded bass guitar and co-written on their first album Fistful of Metal.