SDI is a high technology engineering services firm with a focus on aviation, missile, and UAV systems and operations. Through research, development, production, and deployment management, SDI is able to make the customer a smart buyer of advanced weapons systems. SDI works primarily in support of our major customer, the U.S. Army Aviation and Missile Command. The Army relies on SDI for its expertise and experience in aviation, UAV, and missile programs. For more than 35 years, SDI has made valuable contributions to almost every major successful weapons system program.