As a leader in infrastructure overhaul projects and as a network architect, I play a crucial role in assessing and improving clients' IT infrastructures. Conducting audits before and after our interventions ensures that these infrastructures adhere to best practices and comply with European and French regulations such as GDPR, NIS2, and Loi Abeille. These audits are extensive and serve as our initial knowledge base for client engagements, documenting and reporting findings in security, performance, best practices, backup solutions, regulatory compliance, and resilience. This comprehensive auditing process allows us to track all significant changes over time, ensuring thorough oversight of hardware, software, network configurations, telecommunications, internet access, subscriptions, licenses, EDR systems, antivirus solutions, and much more.