Role: Systems Administrator

Location: San Diego, CA - 5 days onsite

Type: Contract/CTH

Job Description:

The System Administrator is responsible for supporting, maintaining, and improving core infrastructure, including servers, virtualization platforms, storage, identity services, and endpoint systems. This role ensures the stability, availability, and security of enterprise systems through routine administration, proactive monitoring, documentation, and adherence to IT standards. They will work closely with senior engineers and the cybersecurity team to maintain daily operations, resolve Tier-2 issues, and support key infrastructure initiatives.

Essential Functions

Infrastructure & Systems Support

Strong experience in administering and maintaining Windows Server and Linux systems; perform routine patching, updates, and system configuration
Hands on experience supporting VMware ESXi, vCenter, and virtual server operations including provisioning, snapshots, and performance checks
Assist with Veeam Backup & Replication job monitoring, restores, and backup validation tasks
Strong experience maintaining Active Directory, Group Policy, DNS, DHCP, and identity-related configuration changes
Perform hardware installation, racking, cabling, and lifecycle maintenance for servers and storage

Network & Security

Support firewall, VPN, and network appliance operations (Cisco / Fortinet / Palo Alto) under senior engineer guidance
Ensure systems meet security hardening standards and participate in patch compliance activities
Assist with troubleshooting endpoint protection, email security (DMARC/SPF/DKIM), and vulnerability remediation

Monitoring, Documentation & Operations

Monitor system performance using tools such as SolarWinds, Grafana, or Dynatrace and escalate anomalies
Document configurations, SOPs, diagrams, and asset changes in ServiceNow and Confluence
Perform Tier-2 troubleshooting for server, application, and endpoint issues; escalate when needed
Participate in disaster recovery tests and support backup verification activities

Collaboration & Service Delivery

Work closely with senior administrators on infrastructure modernization, patch campaigns, server migrations, and cloud projects
Provide high-quality service to internal customers and support cross-functional IT initiatives
Participate in on-call rotation and after-hours maintenance windows

Education And Experience

Associate or bachelor’s degree in IT, Computer Science, or related discipline
3-5 years of experience in system administration in a medium or enterprise environment. Strong experience with Windows Server, Linux, VMware, and Active Directory
Strong experience with security frameworks, patch management, and system hardening

Certifications (Preferred)

Microsoft Certified: Windows Server / Azure
VMware VCTA/VCP
CompTIA Network+, Security+, or Linux+
Veeam Certified Technician (VMCT)

WORK ENVIRONMENT

On-site presence required 5 days a week
Participation in after-hours maintenance and on-call rotation
Occasional travel to facilities or data centers
Must be able to lift up to 40 lbs for hardware installation tasks

OSI Digital

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