As cyber threats evolve and regulations tighten, IT professionals struggle to maintain effective auditing practices and ensure robust cybersecurity across complex systems. Drawing from over a decade of submarine military service and extensive cybersecurity experience, Lewis offers a unique blend of technical expertise and field-tested insights in this comprehensive field manual. Serving as a roadmap for beginners as well as experienced professionals, this manual guides you from foundational concepts and audit planning to in-depth explorations of auditing various IT systems and networks, including Cisco devices, next-generation firewalls, cloud environments, endpoint security, and Linux systems. You’ll develop practical skills in assessing security configurations, conducting risk assessments, and ensuring compliance with privacy regulations. This book also covers data protection, reporting, remediation, advanced auditing techniques, and emerging trends. Complete with insightful guidance on building a successful career in IT auditing, by the end of this book, you’ll be equipped with the tools to navigate the complex landscape of cybersecurity and compliance, bridging the gap between technical expertise and practical application.