Theo Stiegler comes to sound engineering as a musician first. A classically trained cellist and guitarist, now singer and bassist;theo is a native of East Germany, where he grew up listening to gospel and Bach.  He sings, plays stringed instruments, occasionally tenor saxophone, and experiments with vocal bass, vocal percussion and live looping of all of the above.  Theo arranges much of the material performed in Dissonant Grace, a project featuring his wife Morgen Stiegler.  As a member of various ensembles Theo has toured in Central America, Europe, Taiwan, and South Africa; performing in venues including the Birdland in Hamburg, Rusty's Jazz Cafe in Toledo, Regina Mundi in Soweto, das Schlot in Berlin, the presidential residences in Taipei and San Jose, and the United Nations and WHO in Geneva along the way.

Theo has worked as a sound engineer since the mid-1990s in a variety of formats and settings from assistant engineer to FOH to live recordist...  He has had the privilege to mix shows for artists as divers as:  New York Voices, Jamey Haddad's All Star Sextet, Beau Bristow, Ilona Knopfler, Scott Wendholt, Dick Oats, Morgen Stiegler and the Toledo Jazz Orchestra with sidemen includig Jay Ashby (Paul Simon), Mark Soskin (Sonny Rollins), Paul Nowinski (Les Paul), Marcello Pellitierri (GypsyKings), Ray Porello (Sammy Davis Jr.), Olman Piedra (Nomo), Kip Reed (Donna Summers), Klaus Mueller (Joan Osborne), Kevin DiSimone (Barry Manilow), David Bixler (Chico O'Farrill), Alain Mallet (Phil Woods) and Marty Ashby (Nancy Wilson).  He has also assisted at the boards for M-pact, Naturally 7 and Sean Jones.   

Theo is responsible for scheduling, sound, & logistics, and works as technical director,public and artist relations manager for The BGSU New York Voices vocal jazz camp and has worked in a variety of such roles for the World Vision Youth Ambassadors 1998-2000, as well as various festivals and concert series.  Theo is also responsible for PR and publicity for a variety of artist friends in germany and the US most prominently his wife Morgen Stiegler.