 In June 2007 , the band performed at the Download Festival in Donington Park , England . The group also played at the Sounds of the Underground festival along with Amon Amarth , Chimaira , Gwar , and Shadows Fall . In October , Job for a Cowboy co @-@ headlined the 2007 Radio Rebellion Tour , teaming up with Behemoth , Gojira and Beneath the Massacre . The band featured on the 2008 's Gigantour with headliners Megadeth , Children of Bodom , In Flames and High on Fire . In addition , they have been confirmed for a number of festivals during 2008 , including Wacken Open Air in Germany and a second appearance at England 's Download Festival . Job for a Cowboy have embarked on a U.S. headlining tour in November and December 2008 with supporting acts Hate Eternal and All Shall Perish . In late @-@ 2008 guitarist Ravi Bhadriraju left Job for a Cowboy to return to school because he wanted to pursue a more rewarding career in the medical field . ; he was replaced with former Despised Icon guitarist , Al Glassman . 
