Keith Wallen

On June 24, 2014, Wallen released his first solo effort, a five-track indie acoustic and piano driven Allies EP.

On August 19, 2014, after four years of hiatus, Breaking Benjamin announced the reformation via the official Facebook page. The band re-emerged as a quintet, including Wallen as a guitarist and backing vocalist.

From 2009 to 2013, Wallen was a guitarist and backing vocalist for Las Vegas, Nevada based rock band Adelitas Way. During the time with the band, he took part in recording of two albums, Adelitas Way (2009) and Home School Valedictorian (2011), as well as intensive touring and sharing the stage with such notable acts like Guns N' Roses, Creed, Papa Roach, Godsmack, Theory of a Deadman, Three Days Grace, Deftones, Puddle of Mudd, Sick Puppies, Staind, Alter Bridge, Skillet, Halestorm and others. Wallen also co-wrote three song for Home School Valedictorian, "Cage the Beast", "I Can Tell" and "Hurt".

In 2008, Copper released their third album, Take My Chances. It included single "Broken Sky" and a song "Call to Action", which was covered and re-recorded by a Christian rock band Pillar for their album Confessions in 2009. Soon after the album release, Copper went on hiatus, playing two reunion shows: in 2011 and The Fragile Fall 15th anniversary show in 2018.

In 2005, Copper was selected from 3000 participants as the winner of J. D'Addario, Guitar.com and Fuse "We're Listening" contest, resulting in appearance on the Fuse Daily Download in March 2006 and being the centerpiece of D'Addarios television and print campaign.

Copper's roots go back to Shady Spring, West Virginia, where Wallen and lead guitarist Shane Bragg had been friends since the first grade. They teamed up for occasional acoustic shows, but only began seriously putting a band together while Wallen was attending college at University of Tennessee in Knoxville and Bragg was enrolled at Middle Tennessee State University in Murfreesboro. The original lineup included Wallen, Bragg, bass player Brad Reynolds, and a rotating pair of drummers. They recorded Copper's debut album, Exchange (2001). Drummer and singer Brack Owens joined soon after Exchange was released, and a second album, The Fragile Fall, was recorded with producer Travis Wyrick and released in 2003. Bragg then left the band and was replaced by Shawn Lickliter. Owens and Lickiter were later replaced by Lincoln Nesto on drums and Mike Barnes on lead guitar.

Keith Wallen (born February 24, 1980) is an American musician, singer, songwriter and record producer from Shady Spring, West Virginia, best known as the rhythm guitarist and backing vocalist of the rock band Breaking Benjamin, former guitarist and backing vocalist of Adelitas Way and the co-founder, lead singer and guitarist for Knoxville, Tennessee based band Copper.