You got

Geoff, one of the founders of Roosterteeth. Created Achievement Hunter

Jack, worked for Roosterteeth since the olden days, basically the co-founder of AH

Michael, who was hired because of his successful Rage Quit series

Gavin, a fan, who made a 9.7 million sub channel just to get a visa to work at Roosterteeth.

Jeremy, an avid member of the community who created the epic rap battles of RT

Ryan, Craigslist