This webinar series explores the complete journey of Electro-Optical Infrared (EOIR) system development, from optical design to sensor validation. Learn workflows for design optimization, stray light control, and sensor performance evaluation under real-world conditions. Each session focuses on application-driven challenges such as environmental effects, noise, and detection accuracy. Demonstrations use Zemax, SPEOS, and Lumerical to showcase state-of-the-art simulation techniques.