Add ability to use "TAGS" for instructors

Under System Users and then Instructors, it only allows you to choose one Instructor Type. Is there a way we can get it where you can add more than one Instructor Type for a certain person? We have some Teaching Pros that also do Personal Training, so they can have both Teaching Pro & Personal Trainer listed under Instructor Type. This will help them in planning out their schedules. We a not allowing members to book personal trainers through Court Reserve, it is just for scheduling purposes.