In the realm of Fiber Optic Telecommunication installations, underground fiber optic cable installation is a well-established technique that continues to be vital for various applications. As an experienced engineer, I can attest to the importance of a successful underground installation, as it ensures long-term network reliability and robustness. Today, I will unveil the secret behind a successful underground fiber optic cable installation, exploring the key factors that contribute to seamless engineering and adherence to CSA Underground Systems C22.3 No. 7-15.