TechDork

Systems Administrator — Virtualization & Exchange

Burbank Airport • Freelance

Nov 2009 - Jan 2025 • 15 yrs 2 mos

Managed on-premise virtualization infrastructure and Microsoft Exchange cluster for Burbank Airport. Responsible for maintaining high-availability systems in a critical operations environment where downtime was not an option. Key responsibilities and achievements: - Designed and managed on-premise virtualization environment — virtual machine provisioning, resource allocation, and performance tuning - Administered Microsoft Exchange on-premise cluster — mailbox management, DAG configuration, and replication health monitoring - Maintained server infrastructure supporting airport operations and internal staff - Performed proactive monitoring, patching, and maintenance to prevent downtime - Rapid response to any system issues to ensure continuous operations - Documented infrastructure for internal IT continuity Environment: Windows Server, Hyper-V / VMware, Microsoft Exchange, Active Directory, on-premise networking.

Senior Systems Administrator

Vigilant Technologies • Fulltime

May 2001 - May 2024 • 23 yrs

Full-scope systems administration role covering virtualization, database management, networking, and security. Earned multiple industry certifications while actively managing production environments. Key responsibilities and achievements: - VMware vSphere administration — earned VCP5 and VCP6 certifications while managing production virtualization infrastructure - SQL Server implementation and ongoing maintenance — database setup, performance tuning, backups, and recovery - Network administration and infrastructure management - Security hardening and compliance — earned CompTIA Security+ while implementing security controls across the environment - Windows Server administration — Active Directory, Group Policy, DNS, DHCP - Endpoint management and patch deployment across the organization - Backup and disaster recovery planning and execution - Worked across multiple client environments managing diverse infrastructure stacks Certifications earned during tenure: - VMware Certified Professional 5 (VCP5) - VMware Certified Professional 6 (VCP6) - CompTIA Security+ Environment: VMware vSphere, Windows Server, SQL Server, Active Directory, networking infrastructure.

Systems Administrator

Gilbane Building Company • Fulltime

Aug 2009 - Jul 2022 • 12 yrs 11 mos

Nearly a decade of systems administration at Gilbane Building Company — one of the largest privately held construction and real estate firms in the US. Responsible for enterprise email infrastructure and backup systems supporting thousands of employees nationwide. Key responsibilities and achievements: - Administered Microsoft Exchange email cluster — high-availability configuration, DAG management, mailbox administration, and performance monitoring for enterprise-scale environment - Managed Commvault backup infrastructure — backup policy management, job monitoring, restore testing, and disaster recovery planning - Maintained Windows Server environment across multiple sites - Active Directory administration — user accounts, group policy, access management - Supported enterprise-scale infrastructure for a nationally operating construction firm - Ensured email uptime and data protection compliance across the organization - Coordinated with multiple departments and site locations for IT continuity Environment: Microsoft Exchange, Commvault, Windows Server, Active Directory, enterprise networking.