What is a weapon system instructor?

A Weapon System Instructor (WSI) is a highly trained military professional responsible for teaching and advising on the operation, tactics, and integration of advanced weapon systems. Typically found in air forces, such as the U.S. Air Force Weapons School, WSIs instruct pilots and other personnel on how to maximize the effectiveness of weapon platforms and systems in various combat scenarios. They play a crucial role in developing and refining tactics, ensuring the highest proficiency and readiness among operational units. WSIs are often considered subject matter experts and are involved in both classroom instruction and practical training exercises.