NATHANIEL BRASSELL
Lima,OH
Summary
Seasoned Systems Administrator with extensive experience in modernizing on-prem enterprise infrastructure, including virtualization, Linux systems, and datacenter operations. Expertise in managing VMware vSphere and ESXi environments, ensuring licensing compliance, and executing automation and security patching. Proficient in administering VDI environments, maintaining physical infrastructure, and troubleshooting Linux deployments, contributing to reliable support for approximately 120 users.
Overview
4
4
years of professional experience
1
1
Certification
Work History
Systems Administrator
GROB Systems Inc.
Bluffton, USA
05.2023 - Current
- Administer and maintain enterprise IT infrastructure supporting approximately 120 users across production and business operations
- Manage VMware vSphere and ESXi environments, including host configuration, monitoring, patching, and lifecycle management
- Led the successful upgrade of VMware vSphere and ESXi infrastructure from version 7 to 8 with minimal user impact
- Automated infrastructure checks, licensing validation, and administrative tasks using PowerCLI
- Perform regular patching and security updates, prioritizing remediation of critical vulnerabilities and CVEs
- Maintain, patch, and troubleshoot Linux server deployments, including Docker-based workloads
- Ensured Broadcom VMware licensing compliance aligned to CPU core counts, validated through PowerCLI audits and reporting
- Executed datacenter refresh initiatives through hardware upgrades, environment cleanup, and optimization efforts
- Provided Tier 2/3 escalation support for complex infrastructure and system issues
IT Help Desk Specialist
GROB Systems Inc.
Bluffton, USA
07.2022 - 05.2023
- Delivered technical support for hardware, software, and network issues in Windows enterprise environment, ensuring minimal downtime
- Managed Active Directory user accounts, group memberships, and permissions
- Installed, configured, and maintained end-user systems and applications
- Recorded incidents and resolutions in ticketing system to enhance knowledge base and improve response times
- Supported hardware deployments, system imaging, and user onboarding/offboarding to streamline new employee integration
Education
High School Diploma -
Waynesfield-Goshen Local
Waynesfield, OH05-2010
undefined
Skills
- VMware vSphere 7-8
- ESXi
- Omnissa Horizon
- Application Volumes
- Virtual desktop infrastructure
- PowerCLI automation
- Datacenter operations
- Windows Server
- Windows 10
- Windows 11
- Active Directory
- DNS
- Group Policy
- Linux server administration
- Patch management
- Security patching
- CVE remediation
- ITAR compliance
- Docker-based workloads
- Hardware lifecycle management
- FileCloud secure file exchange
Certification
VMware vSphere: Install, Configure, Manage (V8)
Timeline
Systems Administrator
GROB Systems Inc.
05.2023 - Current
IT Help Desk Specialist
GROB Systems Inc.
07.2022 - 05.2023
High School Diploma -
Waynesfield-Goshen Local