In addition to writing and lecturing, David routinely performs as an IT security and compliance consultant, performing gap analysis and remediation services largely focused in the Payment Card Industry Data Security Standard (PCI-DSS credit card data), and the Healthcare Information Portability and Accountability Act (HIPAA - patients' medical information) for medical practices. He is a Qualified Security Assessor of PCI and a Microsoft Subject Matter Expert on the Windows Active Directory enterprise network operating system platform. He performs as a security designer and architect working with Dell SecureWorks security consulting.
David is an author, a lecturer, and technical editor of books, curriculum, certification exams and computer based training videos. He has had ten books published to date, with five of them focused on IT security, and the others targeting enterprise level network engineering, network architecture, and operating system administration.