Bill Halsey, the man behind Cosmosis  (side projects: Abraxas, Mumbo Jumbo ) is a former professional guitarist from London. 
As a pro guitarist he performed TV and radio shows, played with many bands, playing Rock, Funk, Jazz, Blues, Pop and Hip-Hop, and toured with bands around Europe and Australasia.
 
Bill says : "Being a session muso was a game of extremes; some of the bands that I played with contained some of the most incredibly talented musicians that I ever had the pleasure to blag my way onto a stage with. On the other hand many of the bands were way beyond bad and I ended up having to commit some of the most heinious musical crimes known to man on a very regular basis - in the name of making a living..."
 
Honing his writing and recording skills by composing and and recording pop tracks for ten years before an epiphany with dance music in the early 90's caused him to pursue creating electronic music.
 
Much in demand for live appearances playing his unique style of full power Psytrance, during the last 20 years Cosmosis live shows have occurred on dance floors quite literally all over the globe, in such places as:
 
Japan, Taiwan, Brazil, Israel, India, Bali, Germany, Australia, New Zealand, Colombia, United States, Egypt, Switzerland, Hungary, Sweden, Slovakia, Denmark, England, Spain, Canada, Serbia, Scotland, Belgium, Finland, Holland, Greece, South Africa, Russia, France, Turkey, Ireland, Cyprus, Mexico and Portugal, Croatia, Bulgaria, Austria, Italy, Macedonia and plays regularly in many of these countries
 
Bill now divides his time between making full power dance music in his studio, lazing about in a hammock with his acoustic guitar in the garden drinking Oolong tea, and touring the full power Cosmosis show on dance-floors and festivals worldwide.

Currently based in Ibiza  at "The Vibrozone" where he continues to create music both solo and in collaboration with other producers.

Limor Lasry is following