Gabe Corsini - Microsoft Security Architect

About

I am a Managing Consultant and Microsoft Security Architect at GuidePoint Security, where I co-lead the Microsoft Security Practice. My work focuses on identity-first, scalable cloud security across Entra ID, Microsoft 365, and Defender XDR.

I help organizations build secure, resilient cloud environments that balance real-world threats with practical, sustainable security. My background spans enterprise identity, cloud security architecture, SOC modernization, and both defense and commercial environments.

Current focus: Leading identity, M365, and XDR architecture efforts with an emphasis on clarity, simplicity, and outcomes that matter.

Experience

Managing Consultant — Microsoft Security Architect

GuidePoint Security | May 2025 - Present
  • Co-lead the Microsoft Security Practice, guiding identity, M365, and XDR architecture across enterprise clients
  • Design and deliver identity-first security architectures using Entra ID, Conditional Access, and Zero Trust frameworks
  • Lead M365 security hardening, DLP/Purview, and secure collaboration initiatives
  • Architect Defender XDR deployments with a focus on scalability, governance, and real-world outcomes
  • Enable organizations to adopt practical, sustainable security that aligns with business goals

Solutions Architect — Microsoft Cloud Security

Ardalyst | Jan 2023 - May 2025
  • Architected identity and cloud security for 60+ Microsoft 365 environments, ensuring compliance with CMMC, DFARS, and industry standards
  • Designed and deployed Entra ID, Conditional Access, and Zero Trust architectures
  • Led security operations modernization using Microsoft Sentinel, Defender XDR, and cloud-native tools
  • Delivered M365 security hardening, threat protection, and governance strategies
  • Provided pre- and post-sales architecture support across the full customer lifecycle

Information Systems Technician First Class

U.S. Navy | 2012 - 2022
  • Managed secure communications and security operations for mission-critical defense systems
  • Led Microsoft 365 deployment for Operation Flank Speed, supporting 500,000+ users with secure identity and access management
  • Implemented Entra ID and security solutions during large-scale remote work transformation
  • Maintained classified system security protocols and incident response procedures

Skills

Identity & Access

Entra ID Conditional Access Zero Trust Privileged Access

Microsoft 365 Security

M365 Hardening DLP/Purview Secure Collaboration Information Protection

XDR & Threat Protection

Defender XDR Defender for Endpoint Defender for Cloud Sentinel

Architecture & Strategy

Identity-First Design Cloud Security Architecture Governance & Scalability Security Modernization

Philosophy

Security should scale. Simplicity should stick. And architecture should make sense to the people who use it.