This textbook is designed to teach students and practitioners how to integrate Six Sigma techniques with cybersecurity applications, specifically in training current and future cybersecurity professionals. It utilizes the DMAIC process (Define, Measure, Analyze, Improve, and Control) to strengthen cybersecurity defenses against cyber-attacks while reducing costs and waste. Recognizing that Six Sigma training requires a solid understanding of statistics and technology for effective data analysis, the book covers relevant statistical concepts along with essential Six Sigma, Lean, quality, and technology principles. These are crucial for readers to understand, adopt, and implement continuous improvement strategies in the workplace, ultimately making them a part of their cybersecurity project management culture. This book is suitable for undergraduate courses, depending on the curriculum's specific statistics and technology requirements. It can also serve as a Six Sigma certificate training resource for professionals in the field.