Sam Qubain


Sam brings over 27 years of management, product reliability and process improvement experience. He holds an engineering degree with graduate studies in business and advanced engineering. Sam also holds Lean Manufacturing certification from the University of Tennessee, Black Belt and Green Belt Six Sigma training and certification, and is a current lecturer on topics in Industrial Engineering. His experience with OEMs provides a specialized knowledge of OEM practices, and a keen sense of customer needs. Most recently, he was an engineering and product quality manager at Hamilton Sundstrand Worldwide.

Phone: 909.981.0895

Warren Brown

V.P. Biz Development

With over 24 years of experience in customer support engineering, warranty analysis, and repair operations, Warren is a veteran of aftermarket services for a variety of propeller and jet aircraft. He serves as the Business Development specialist and successfully secured major accounts for QTC. As a certified pilot, Warren can also communicate to customers on their level.

Phone: 909.981.0853