David R. is a Microsoft Certified Trainer with sixteen years of experience across Microsoft infrastructure, cloud architecture, and enterprise identity. He holds Azure Solutions Architect Expert and Azure Administrator certifications, and has delivered authorized Microsoft training for over a decade to audiences ranging from IT generalists entering cloud roles to senior architects re-platforming on-premises Active Directory estates.
David’s technical background is rooted in Windows Server and Active Directory administration. He spent seven years as a systems engineer at a managed services provider, where he designed and supported hybrid environments for mid-market and enterprise clients — work that required intimate familiarity with Entra ID (formerly Azure AD), Exchange hybrid, and the PKI infrastructure that underpins certificate-based authentication. That background gives him a strong foundation for teaching Azure architecture as a practical discipline rather than a theoretical exercise.
At Boost eLearning, David teaches the full Azure certification track from AZ-900 fundamentals through the AZ-305 architecture design exam. His sessions lean hard on scenario-based learning: students in Boost’s Live Lab environment configure virtual networks, implement role-based access control, design landing zones, and work through the kind of multi-subscription governance problems that show up in real enterprise accounts. He believes that Azure’s complexity is best understood by building things, breaking them, and fixing them under light time pressure — which is exactly what the live labs are designed for.
David pays particular attention to the gap between associate-level and professional-level thinking. He coaches students on how to shift from “how do I configure this” to “why would I choose this architecture and what are the trade-offs” — the mindset that separates someone who passed AZ-104 from someone who can defend an architecture decision to a stakeholder. He uses Boost’s retention tools to ensure students revisit Entra ID concepts, Policy definitions, and networking constraints at spaced intervals so the knowledge compounds rather than evaporates between sessions.
David also holds Microsoft 365 Enterprise Administrator Expert and regularly teaches Microsoft 365 fundamentals courses as a complement to Azure tracks.