Metal Allegiance is an American thrash metal supergroup formed on Long Island, New York, in 2014 by bassist and songwriter Mark Menghi. Shortly after, he recruited bassist David Ellefson, guitarist Alex Skolnick, and drummer Mike Portnoy. Though the group does not have an official lead singer, they usually hire guest musicians to contribute vocals and/or guitar parts to their studio recordings and live shows, including Andreas Kisser of Sepultura and Mark Osegueda of Death Angel. To date, Metal Allegiance has released two studio albums and one EP.