Systems Administrator It

Professional Summary

Accomplished Senior Systems Administrator with over 18 years of experience optimizing complex IT infrastructures. Specialized in VMware administration, Windows Active Directory, automation, and disaster recovery. Proven ability to manage and scale environments with 1000+ VMs and 400+ endpoints, ensuring high availability, robust security, and streamlined IT operations. Skilled in leading system migrations, automating tasks to boost efficiency, and implementing performance improvements that drive operational excellence across organizations.

Education

Master's Degree, Information Systems George Washington University

September 2004 - May 2006 Washington, DC

Bachelor's Degree, Management Information Systems Technology University of Maryland

September 1999 - May 2003 College Park, MD

Work Experience

Sr. Corporate Services Engineer DrFirst.com, Inc. August 2006 – January 2025

System Administrator for Windows, Linux, Vmware, specializing in automation, disaster recovery, backup and data center.

VMware Administration:

●Spearheaded the successful upgrade and migration of VMware ESXi infrastructure from version 5.5 to 7, supporting 50+ hosts and 1000+ VMs, ensuring uninterrupted service and enhanced performance across a large-scale virtualized environment.

●Designed and executed seamless VCenter upgrades from version 5 to 7, maintaining system availability during transition.

●Engineered and deployed reliable Windows and Linux server environments, optimizing system uptime and efficiency.

Datacenter Operations & Infrastructure Management:

●Led the configuration, administration, and optimization of Dell rack-mount servers, Cisco UCS blades, and NetApp storage solutions, improving hardware provisioning and system performance.

●Orchestrated full-rack migrations across colocation facilities, reimagining system layouts for improved cable management and operational efficiency.

●Managed service profiles and templates on Cisco UCS, accelerating hardware provisioning and deployment.

Automation & Scripting:

●Developed and deployed PowerShell and batch scripts to automate endpoint hardening and streamline security patch management, resulting in a 30% reduction in manual administrative effort.

●Introduced workstation automation software that reduced new hire provisioning time by 50%, enhancing onboarding efficiency.

●Leveraged Quest KACE to automate endpoint management, software installation, and patching, significantly enhancing IT security and operational productivity.

Windows Active Directory & Hybrid Environments:

●Led the migration of Active Directory from 2008 to 2019 and facilitated the upgrade of workstations from Windows 7 to Windows 11, ensuring minimal disruption and seamless user experience.

●Managed complex Active Directory environments, optimizing user account management, group policies, and permissions.

●Administered hybrid AD and Azure AD environments, integrating on-premises systems with cloud-based identity solutions. Configured Azure AD Connect for streamlined directory synchronization.

Disaster Recovery & Backup Solutions:

●Spearheaded the implementation of Zerto disaster recovery solutions, enabling comprehensive virtual replication and testing of failovers for critical applications, ensuring business continuity.

●Led the transition of disaster recovery infrastructure from Windows-based to Linux-based Zerto appliances, ensuring higher reliability and scalability.

●Managed both on-premises and cloud backups through Arcserve UDP and Syscloud, ensuring robust data protection.

Networking & Security:

●Designed and deployed secure networking solutions using Cisco Meraki and HP ProCurve switches, enhancing network reliability and security.

●Instituted and maintained server and endpoint hardening protocols, ensuring compliance with industry standards and protecting against emerging cyber threats.

User Support & Service Management:

●Delivered exceptional user support for 400+ Windows desktops, resolving 100+ technical support tickets per week while maintaining a focus on proactive infrastructure improvements.

Technical Skills

Virtualization & Cloud:

●VMware ESXi (5.5, 6, 6.5, 6.7), VMware DRS, VMware HA Clusters

●Zerto replication for disaster recovery

●Okta MDM, Arcserve UDP, Syscloud backup solutions

●GitLab administration and migration

●JAMF and KACE for endpoint management

Operating Systems:

●Windows Server (2008-2019), Windows 10/11

●Linux (CentOS, RedHat)

Networking & Security:

●Cisco Meraki and HP ProCurve switches

●Endpoint security management and compliance

Languages

Fluent in English and Spanish

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