Southern California born and raised from Sky Valley to Orange County in the 1970/80s. He attended Woodbridge High School, where he formed lasting friendships with musicians who shaped his career.

In the 1990s, Aaron played bass in Smile (Atlantic/Headhunter Records), a grunge and psychedelic rock band that gained radio success with hits on KROQ and 91X and toured with bands like Everclear, Silverchair, and Deftones. Notable songs include “Staring at the Sun” from Maquee and “Instant Brain Damage” from their second album Girl Crushes Boy, produced by Mark Trombino (Blink-182, Jimmy Eat World). Before Smile, he was part of Headfirst, a metal-edge hardcore band that toured the U.S. and released a handful of vinyl records. Aaron also played with his musical family in Daughter Eve and in the 2010’s, The Hollybells, showcasing his musical versatility. He currently produces solo music under the name ToyTrax.

With over 25 years of experience as a Freelance UI/UX Designer, Aaron runs a boutique agency, Sonnenberg Design, and specializes in AI, web, and mobile design, focusing on SEO-friendly sites, e-commerce, and mobile apps. Skilled in platforms like WordPress, Squarespace, and Shopify, he blends creativity with technical expertise. He holds a Certified Internet Webmaster (CIW) certificate and an Associate Degree in General Art.