NATHAN GREIG
Toutle,Washington
Summary
Results-driven IT leader with 20 years of experience directing enterprise infrastructure supporting 800+ users across distributed environments. MBA-qualified technology professional with expertise in Windows Server architecture, Active Directory governance, cybersecurity compliance, enterprise patch management, and multi-site modernization initiatives. Proven success leading technical teams of up to 30 personnel, executing international infrastructure upgrades, and strengthening organizational security posture. Prepared to deliver operational stability, risk reduction, and strategic IT alignment in an IT Manager role.
Overview
20
20
years of professional experience
1
1
Certification
Work History
Information Systems Technician | Infrastructure Supervisor
US Navy
Denver, Colorado
01.2019 - Current
- Direct enterprise infrastructure operations supporting 800+ users across distributed environments.
- Oversee administration of 11 enterprise Windows Server systems delivering authentication, file services, and mission-critical applications.
- Govern Active Directory architecture including access control, permissions management, and policy enforcement.
- Lead structured patch management and system hardening efforts to reduce vulnerability exposure and maintain compliance.
- Supervise and develop a 10-person technical team, driving accountability and operational consistency.
- Implement standardized procedures and technology improvements that increased efficiency and improved cross-department coordination.
- Serve as senior escalation authority for complex infrastructure and security incidents.
Information Assurance Leading Petty Officer / Information Systems Security Officer
US Navy
Manama, Bahrain
01.2014 - 01.2016
- Served as enterprise ISSO overseeing security posture and regulatory compliance for mission-critical systems.
- Directed Certification and Accreditation activities supporting Authority to Operate approvals.
- Led security configuration, vulnerability remediation, and patch governance for 26 Program of Record systems.
- Implemented risk mitigation controls aligned with federal cybersecurity frameworks.
- Supervised and mentored 30 personnel in secure IT operations and compliance execution.
- Strengthened organizational risk posture through disciplined remediation tracking and oversight.
Network Administrator | Infrastructure Modernization Lead
Office of Naval Intelligence
Whidbey Island, WA
01.2010 - 01.2013
- Managed LAN/WAN operations and Windows Server infrastructure supporting enterprise operations.
- Directed Active Directory administration and access governance across distributed sites.
- Led international modernization initiative replacing and upgrading 10 enterprise servers across Naples, Souda Bay, Rota, and Crete.
- Coordinated phased multi-site deployment minimizing downtime and maintaining compliance.
- Improved system reliability through disciplined monitoring and backup governance.
System Administrator / Team Lead
US Navy
Everett, Washington
01.2006 - 01.2010
- Led a 4-person infrastructure team responsible for enterprise network and server operations.
- Executed hardware and software upgrade initiatives improving system stability and performance.
- Directed backup and recovery operations ensuring continuity of operations.
- Established operational standards and mentored junior personnel in infrastructure management.
Education
Master of Business Administration (MBA) - IT Management
American Military University
Bachelor of Science - IT Management
American Military University
Associate Degree - General Education
Skills
- Enterprise Infrastructure Management
- IT Operations Leadership
- Active Directory & Identity Governance
- Cybersecurity & RMF Compliance Oversight
- Enterprise Patch & Vulnerability Management (26 Systems)
- Multi-Site Infrastructure Modernization
- Disaster Recovery & Business Continuity Planning
- Technical Team Supervision & Workforce Development
- Cross-Functional Stakeholder Engagement
- Process Optimization & Operational Standardization
Certification
- CompTIA SecurityX (ce) – Active through 01/2028
- CompTIA Security+ (ce) – Active through 01/2028
- CompTIA Network+ (ce) – Active through 01/2028
Timeline
Information Systems Technician | Infrastructure Supervisor
US Navy
01.2019 - Current
Information Assurance Leading Petty Officer / Information Systems Security Officer
US Navy
01.2014 - 01.2016
Network Administrator | Infrastructure Modernization Lead
Office of Naval Intelligence
01.2010 - 01.2013
System Administrator / Team Lead
US Navy
01.2006 - 01.2010
Bachelor of Science - IT Management
American Military University
Associate Degree - General Education
Master of Business Administration (MBA) - IT Management
American Military University