He briefly attended Moorpark Community College but dropped out after taking only two classes.
He started playing guitar before he was 10 years old. He was diagnosed with Attention deficit disorder in high school. During high school Bruno was nicknamed "AWOL".
Foreign leaving parties early and used this nickname in rap battles.
Bruno continued to write music He created the song "Sail".
In 2010 as part of AWOLNATION's first European Parliament, Back From Earth. "Sail" would hit #5 on the United States Billboard Alternative Songs chart, going sextuple platinum in America and double platinum in Canada.
In 2011 the album Megalithic Symphony was released.
In March 2015, AWOLNATION released their second album, entitled "Run". Bruno, with some help from his engineer, recorded the entirety of the new album by himself, doing not only the vocals but also the instrumentals and the writing for the new release. Bruno is an avid surfer. According to an interview with Los Angeles Magazine, a little known fact about Aaron is that he is 80% deaf in his left ear.
Quot;I’m 80 percent deaf in my left ear. People trip out on that. I was born that way, so I just roll with lieutenant
But if you listen to the records in your headphones or your car stereo, I tend to pan my favorite instruments to the right because that’s what I can hear.
When I walk into a theater, I always sit just off to the left so I can hear more with my good ear. lieutenant’s funny, though, my wife still talks into my left ear.
When I go to sleep with my right ear to the pillow, I can’t hear anything. lieutenant’s like having an earplug.
So, if someone is talking to me and I don’t care what they’re saying, I can just sit with my left ear to them.".
He is a former member of the post-grunge band Home Town Hero, the indie-popular group Under the Influence of Giants, and Insurgence.