Inspired by numerous productions, including Julie Taymor's Titus Andronicus at TFANA, Coiro decided to study theater at Carnegie Mellon University, where he eventually graduated with a BFA.
[7] At age 19, Coiro got his first professional gig as an understudy to three roles in the American premiere of Conor McPherson's off-Broadway play This Lime Tree Bower directed by Harris Yulin at Primary Stages.
[8] Within a month of graduating from CMU, Coiro landed the role of Eddie the Bellhop in the Lincoln Center revival of George S. Kaufman's Dinner at Eight, directed by Gerald Guitierrez.
In fact, Coiro received the call that he'd landed his first on-screen acting gig, as Billy Walsh on Entourage, while digging a hole for a deck in Echo Park.
During this period, Coiro formed an underground, traditional Irish music band with artists Matt Johnson and Greg Santos, that played around East LA.