Following the establishment of The Program, Harry Pandey sought to gather skilled instructors from across the globe to help with training of Rainbow Operators. In 2020, Harry formally established the ROS as a training division of Rainbow. He then recruited Sam Fisher as the division's first instructor.
- The ROS is Rainbow's second incarnation of a training division. Prior to its dissolution in 2012, Rainbow originally had an "Academy" which was used to teach new recruits. Bishop was a known instructor at the Academy.