The Matt Pack

Matthew Walter Wachter was born January 5, 1976 in Pottsville, Pennsylvania.His interest in music bloomed when he was around five years old, and between the ages of five and eight, Matt experimented with various instruments, focusing primarily on the piano and drums.
Matt reached the peak of his musical interest around high school and spent most of his time playing in bands. He picked up the bass, he stated, because he "wanted to play in a band, and the band needed a bass player." Matt had no previous experience with the bass, the closest being experimenting with the guitar. He credited former Metallica bassist, the late Cliff Burton, as his inspiration for wanting to play the bass guitar.
30 Seconds to Mars
Matt joined Jared Leto, Shannon Leto, and Solon Bixler, rounding out the 30 Seconds to Mars line-up, in 2001.
Wachter often stands in a "pigeon-toed" stance (both feet turned in toward each other) when he plays his bass, and stares down at his feet. He says doing this allows him to focus on what he's playing and keeps him from being distracted by fans.
While on tour in El Paso, Texas, on March 1, 2007, Jared Leto announced to the arena that Matthew would be playing his last show with the band.
Angels and Airwaves
Following the departure of Ryan Sinn from the band Angels & Airwaves, on 23rd April 2007, Wachter joined the band in Sinn's place on their current tour. He was later confirmed as a bandmember, and worked with Angels & Airwaves on their second album entitled I-Empire.
Other works
Wachter serves as an occasional guest host on Get the Fuck Up (GTFU) Radio. The radio show is hosted by two of his friends, Aaron Farley and Jeremy Weiss and is featured on Little Radio, out of Los Angeles.
*source: Wikipedia.org.