Since his arrival on the Chicago scene in 2015, G. Thomas Allen has continued to use his stratospheric range to break barriers in uncharted waters.  His soul-infused phrases, rooted in sacred harmony, and approach to line shaping have made him the first male, in history, to win the Sarah Vaughan International Vocal Jazz Competition - Downbeat Magazine.  

Thomas’ work spans multi-genres, as a former Principal Artist of the Los Angeles Opera, and lead vocalist on GRAMMY-nominated projects both with Ricky Dillard and New G (Motown Gospel).   He has worked with the late David Baker, jazz educator and conductor of the Smithsonian Jazz Masterworks Orchestra at Strathmore Hall, guest soloist with the Black Pearl Chamber Ensemble, Royal Melbourne Philharmonic, and former member of Baltimore's Soulful Symphony.   On the Chicago scene, noted collaborations and recordings with Marquis Hill, Pharez Whitted, and Greg Ward. 

He has appeared on National Public Radio (NPR), and Cable Network News (CNN), and performed at some of the top concert halls in America, including The Kennedy Center, NJPAC, and Carnegie Hall.  Thomas has performed in top jazz rooms including SOUTH Jazz Club in Philly, The Jazz Showcase in Chicago, Minton’s Playhouse in Harlem (birthplace of bebop),  and Keystone Korner  in Baltimore – to name a few.   Noted performance venues and festivals: City Winery - Chicago, Turpin Lamp Theatre, 50th New Orleans Jazz & Heritage Festival, the TD Jazz Moody Jazz Festival, and the White Plains NY Jazz Festival.

In 2020, Thomas’ self-titled debut album hit No. #1 on the iTunes jazz charts.  Currently, the band is working on a sophomore project, Reimagined Dream.  A lead single, "Cookie Jar", was released in 2022 and already making waves with its iconic tagline, “You’ve been tempted by the cookie jar”!   Often compared to the likes of the iconic Philip Bailey and inspired by Al Jarreau, Thomas is one the leading countertenor voices of the 21st century. 

2x-graduate of Morgan State University, as a Vocal Studies alum and second-BA in Speech.  Master of Music in Musical Theatre Vocal Pedagogy, Carthage College - Diversity Fellow May 2023.  CEO/Founder of Allen Studios, LLC.

Thomas serves on the voice faculty of Columbia College of Chicago and Carthage College as a Contemporary Voice Specialist.