Kiera Luu, a native of Silver Spring, Maryland, began her journey with the bass as a middle schooler under the tutelage of Pepe Gonzalez, a renowned and deeply loved jazz bassist in the DC area. Kiera has played in numerous bluegrass, jam, jazz, and classical ensembles.

George Horvat is a Saco, Maine native. Starting with classical viola in his elementary years, George has since migrated to bluegrass, old-time, and Texas-style fiddle. George is a dedicated listener to Bach and consistently upholds tasteful melodies in Stillwater's high end. 

Jonathan "Yoni" Musher is a multi-instrumentalist and prolific songwriter. Hailing from Newton, Massachusetts, Yoni studied jazz from the University of Maine. His songwriting is poetic and evocative, a marker of Stillwater's recognizable sound. 

From Somerset Massachusetts, Jack Pasternak is the multi-tool of the band. Savant of the guitar, bass, dobro, and banjo, and pulling a variety of influences from Mark Lavengood and Mike Auldridge, to Eric Johnson and Joe Dart, Jack is the progressive fusion voice of Stillwater.