CSI Aviation, Inc. is a worldwide aviation services company and FAR Part 135 air carrier (Certificate# GRTA447E) headquartered in Albuquerque, New Mexico with bases in Killeen, Texas, and West Palm Beach, Florida. Founded in 1979 by Allen Weh, CSI provides air charter and aviation services to corporations, and government agencies. CSI also maintains a GSA Schedule (Contract # GS-33F-0025V) to provide air charter services to the Federal government as both an air carrier and manager of aviation programs.

CSI Aviation was founded in 1979 by Allen Weh, a now retired colonel in the United States Marine Corps Reserve.

In 1983, CSI began representing various United States airlines to the U.S. Department of Defense (DOD) through the U.S. Military Traffic Command, which included handling Civil Reserve Air Fleet (CRAF) coordinating domestic and international military scheduled and air charter requirements.

In 2009, CSI began offering fuel services.

In 2014, CSI acquired a Texas based Part 135 Operation to add organic Flight Operations capability to its operations.

In 2016, CSI's Part 135 division added Medical Flight Services, which is accredited by the National Accreditation Alliance Medical Transport Applications (NAAMTA)

In September 2017, CSI deployed a Seeker Aircraft to Southeast Texas in support of the Hurricane Harvey relief efforts.

CSI was awarded the Freedom Award by the Department of Defense in 2017 for its support of military employees.