This presentation will delve into the critical practice of red teaming within the realm of safeguarding our critical infrastructure. As the threat of cyber attacks on these vital systems continues to escalate, their potential consequences for society and the economy are increasingly severe. Red teaming, an innovative simulation-based approach, has emerged as an indispensable tool for uncovering vulnerabilities within these systems and shoring up defenses. Through real-world examples and case studies, we will explore the practical usage and tangible benefits of red teaming exercises. By the conclusion of this presentation, attendees will not only grasp how red teaming can significantly enhance the security of critical infrastructure but also gain actionable insights into staying one step ahead of Advanced Persistent Threats (APTs).