[3] He is a founding member of the crossover thrash band Excel, and subsequently was the lead guitarist for the Suicidal Tendencies side project, Infectious Grooves and the group Eagle, who became The Blondes after receiving a cease and desist letter from Don Henley's legal counsel.

He founded the power trio My Head with Excel former drummer Greg Saenz and played the bass in the indie rock band Eels.

The group was called "Chaotic Noise" with Evan Warech on drums and some temporary bassists during 1984, they played a lot of shows around L.A. with different bands of the same scene like No Mercy, Suicidal Tendencies, Beowülf and Cryptic Slaughter.

[4] Then he definitely left Excel to form his own power trio (called My Head) with Greg Saenz on drums, the former Bad Radio member Dave Silva on bass and himself on guitar and lead vocals.

[5] The sound of this album left the heavy metal music that Siegel had been playing earlier in Excel and Infectious Grooves to approach to styles more similar to alternative rock and grunge.

A few months later he created the band Eagle (who would become "The Blondes" in 2000) with Bill Dusha (ex-Sacred Hearts and Sexy Death Soda) on guitar and vocals, Jimmy James (ex-Coma-Tones and The mansons) on bass, Autumn de Wilde (also graphic designer and art director; her photography and paintings have been used for releases by Beachwood Sparks, Beck, Neal Casal, Eels, Lilys, Elliott Smith, and other artists) on keyboards and back vocals, Byron Maiden (ex-Possum Dixon and the Liquor Giants) on drums and himself on lead guitar and vocals.

They came as long ago talking about writing something together, in May 2008, Siegel joined them to the studio to record their first single,[9] "Light of Love" and a second one, titled "Warm in the Shadows " the January 20, 2009.

The October 6, 2009, they edited their debut studio album: Expressions, as the two previous singles and the EP it was released by Secretly Canadian.