Zero-Trust IT Infrastructure & Security Operations
Resume:
GREGORY M. WILLIAMS
Houston, TX • 424-***-**** • ***************.***@*****.*** • linkedin.com/in/gregory-williams-b3065925/ IT INFRASTRUCTURE & SECURITY OPERATIONS PROFESSIONAL High-Reliability • Zero-Trust Enterprise Systems Engineering • Federal-Grade Security PROFESSIONAL SUMMARY
IT Professional with 15+ years of progressive experience supporting infrastructure operations including global user bases up to 7,000+ users, secure endpoint ecosystems, enterprise software support, software administration, and identity governance across federal, energy, and enterprise environments. Proven experience stabilizing mission- critical systems, modernizing legacy platforms, and enforcing zero-trust security frameworks. Recognized for delivering high-availability operations in regulated, high-security contexts and aligning technology with organizational mission, resilience, compliance requirements, and vendor relations. CORE CAPABILITIES
• Infrastructure Operations • Zero-Trust & Network Security (Cisco ISE, Zscaler, VPN)
• Enterprise Systems Engineering • Microsoft 365 & Exchange Administration
• Enterprise Software Support • Disaster Recovery & Continuity Planning
• Software Administration • ITIL Service Delivery & Incident Management
• Vendor Relations • Executive & VIP Technology Support
• Identity & Access Mgmt. Governance (AD, Entra, Okta) • Cross-Functional Leadership & Mentorship
• Endpoint Engineering & Secure Mobility
INFRASTRUCTURE SECURITY & COMPLIANCE
Enforced federal security protocols across regional DEA operations, ensuring compliance with national and international law-enforcement systems.
Managed identity lifecycle, MFA enforcement, device compliance, and privileged access controls. Implemented zero-trust principles using Cisco ISE, Zscaler, Okta, and AirWatch MDM. Oversaw endpoint encryption, secure mobility, and data protection across Windows, macOS, iOS, and Android. PROFESSIONAL EXPERIENCE
GovCIO / U.S. Drug Enforcement Administration (DEA) - Houston, TX Regional IT Lead - Infrastructure & Security Operations Led regional infrastructure support operations, endpoint engineering, and secure network services supporting 1,000+ users and 40 executives in a high-security federal environment. Led Tier 2/3 engineering, server administration, network troubleshooting, and enterprise endpoint lifecycle management.
Provided enterprise software support for business critical applications, diagnosing and resolving user issues while maintaining high customer satisfaction.
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2014-2016
2013-2014
Administered software platforms including user provisioning, access management, configuration updates, and system maintenance.
Collaborated with software and hardware vendors to troubleshoot escalated issues, coordinate upgrades, and ensure timely resolution of system-related concerns. Served as a liaison between end users, internal stakeholders, and third-party vendors to support performance in business operations.
Led identity and access administration across Active Directory and Entra, including provisioning, de- provisioning, group membership governance, and privileged access controls. Administered AD password policies, including complexity, expiration, reset workflows, and enforcement of federal authentication standards.
Administered and maintained Exchange mailboxes, distribution lists, shared resources, conference rooms, and executive calendars, ensuring secure and compliant access. Oversaw NTFS folder structures and ACL governance, including permission modeling, inheritance management, and audit-ready documentation for sensitive file systems. Generated access, permissions, and group membership reports to support audits, compliance reviews, and least-privilege validation.
Supported Azure/Entra ID identity management, MFA enforcement, conditional access, and cloud app security controls as part of the agency's zero-trust posture. Monitored and analyzed security logging systems, authentication events, and access anomalies to identify risks and strengthen identity governance.
Collaborated with internal security and infrastructure teams to identify and remediate access-related vulnerabilities across applications, servers, and file systems. Delivered advanced troubleshooting for authentication failures, access denials, GPO conflicts, and cross- platform identity issues, ensuring rapid resolution for mission-critical operations. Authored and maintained policies, standards, and procedural documentation for identity management, access workflows, and security operations.
Maintained strict adherence to federal security standards and DEA operational protocols while supporting high- sensitivity personnel and executive leadership.
SPX Technologies - Houston, TX
Technical Support Specialist Lead
Led support operations for 1,200+ users and 10 executives. Managed enterprise endpoint imaging, deployment, and lifecycle maintenance. Oversaw backup/recovery processes and infrastructure monitoring via SolarWinds. Authored knowledgebase documentation and delivered technical training to improve operational maturity. Hines - Houston, TX
Technical Support Specialist II
Administered global AD and Exchange accounts for 1,800+ users. Supported Cisco Unified Communications (CM, Unity, Jabber). Delivered Tier 2 support for enterprise applications including Citrix, Salesforce, JDE, and Microsoft platforms. Provided executive support for 15 senior leaders.
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2004-2013
EARLY CAREER & TECHNICAL FOUNDATION
Technical Support & Systems Administration Roles - Houston & Los Angeles Parker Drilling, Dyonyx, Bowman & Brooke LLP, CompuCom / Warner Bros., Karl Storz Endoscopy, Goodwill Industries
Supported global user bases (up to 7,000+ users) across enterprise and regulated environments. Managed AD/Exchange, SCCM deployments, VOIP systems, A/V platforms, and enterprise print services. Delivered Tier 2/3 support, server monitoring, and endpoint engineering across diverse industries. CERTIFICATIONS
CompTIA A+ • ITIL v3 • HDI Technical Support Professional • HDI Desktop Support Team Lead TECHNICAL SKILLS
Platforms: Windows 7-11, macOS, Microsoft 365, Active Directory, Exchange, Citrix Security & IAM: Cisco ISE, Okta, Zscaler, MFA, VPN Tools: SCCM, SolarWinds, Remedy, Cherwell, ServiceNow, ConnectWise, Salesforce, SharePoint, SAP Hardware: Dell enterprise systems, Cisco networking, HP/Canon printers, Polycom/Tandberg A/V, iOS/Android EDUCATION
Sinclair Community College - Dayton, OH
Coursework Completed Toward A.A.S., Architectural Engineering
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