Kevin Schilder

Kevin Schilder is the composer and sound designer in Heretic and Hexen titles.

Biography
Kevin Schilder is one of three sound designers responsible for sound and music in the products at Raven Software. He has over 30 years of experience in the music field and holds degrees in performance and education. Before working at Raven, he worked in the retail music industry and taught music for six years. Kevin has been associated with Raven Software since its inception, but has been formally employed with the company since 1994.

Source
This article incorporates Biography text from the http://www.ravensoft.com/ homepage.