Description
Job Title: System Administrator
Department: IT Infrastructure & Operations
PURPOSE
The System Administrator is responsible for architecting, implementing, and maintaining the organization's enterprise systems and infrastructure to ensure optimal performance, scalability, and security. This role provides leadership across virtualization, systems, and storage management-supporting mission-critical workloads and driving modernization through automation, observability, and standardization. The System Administrator serves as a technical escalation point, mentors junior team members, and ensures adherence to corporate cybersecurity and compliance standards.
Essential Functions
Infrastructure & Systems Management
Design, configure, and maintain VMware vSphere, ESXi, and vCenter environments.
Administer Windows Server (2016/2019/2022) and Linux (RHEL, Ubuntu, CentOS) systems, including patching, configuration, and security hardening.
Manage Active Directory, Group Policy, DNS, and DHCP for secure identity and network operations.
Implement and maintain Veeam Backup & Replication for enterprise-class backup and disaster recovery.
Support enterprise SAN/NAS storage systems, ensuring high availability and lifecycle optimization.
Network & Security
Configure and maintain firewalls, VPNs, and network appliances (Cisco, Fortinet, Palo Alto).
Work with the Cybersecurity team to ensure system patching, endpoint protection, and compliance with DMARC/SPF/DKIM standards.
Monitor system and network performance proactively and perform capacity planning.
Maintain strict system hardening, access control, and audit compliance.
Automation, Monitoring & Reliability
Develop automation scripts using PowerShell, Bash, or Ansible to streamline system operations.
Implement and maintain monitoring and observability tools such as SolarWinds, Dynatrace, Grafana, or Splunk.
Lead root cause analysis and implement preventive and corrective actions for high-impact incidents.
Participate in continuous improvement initiatives for infrastructure automation and operational resilience.
Leadership & Collaboration
Serve as Tier-3 escalation for complex infrastructure and system issues.
Collaborate with IT leadership to define infrastructure strategy, capacity planning, and modernization initiatives.
Mentor junior administrators and ensure operational standards and documentation are maintained.
Participate in on-call rotation and perform after-hours maintenance as required.
Qualifications
Education:
Bachelor's degree in Computer Science, Information Technology, or a related discipline (or equivalent professional experience).
Experience:
7+ years of experience in enterprise-scale system administration, virtualization, and infrastructure management.
Strong hands-on expertise in VMware, Windows Server, Linux, and Veeam.
Experience managing hybrid cloud environments (Azure or AWS).
Familiarity with ITIL-based processes, change management, and incident management frameworks.
Certifications (Preferred):
VMware Certified Professional (VCP)
Microsoft Certified: Windows Server Hybrid Administrator / Azure Administrator
Red Hat Certified System Administrator (RHCSA)
Veeam Certified Engineer (VMCE)
Cisco CCNA/CCNP or CompTIA Security+
CORE COMPETENCIES
Advanced knowledge of enterprise infrastructure architecture and operations.
Deep understanding of virtualization, networking, and cybersecurity principles.
Strong analytical, documentation, and troubleshooting skills.
Excellent communication and leadership skills with a focus on accountability and service excellence.
Proven ability to manage multiple priorities in a fast-paced environment.
WORK ENVIRONMENT
This position requires on-site presence five (5) days per week at the designated office or data center location.
Participation in after-hours maintenance and on-call rotation is required.
Occasional travel to remote facilities or data centers may be necessary.
Must be able to lift up to 40 lbs and perform hardware installations when needed.
Tools & Technologies Summary
Category Tools / Technologies
Virtualization VMware vSphere, ESXi, vCenter, Hyper-V
Server Administration Windows Server 2016/2019/2022, Linux (RHEL, Ubuntu, CentOS)
Backup & Recovery Veeam Backup & Replication, Azure Backup
Networking & Security Cisco Firewalls & Switches, Fortinet, Palo Alto, VPN, DMARC/SPF/DKIM
Storage Systems SAN, NAS, iSCSI, RAID Configurations
Automation & Scripting PowerShell, Bash, Ansible
Monitoring & Observability SolarWinds, Dynatrace, Grafana, Splunk
Cloud & Identity Azure AD, Microsoft 365, Intune, Entra ID
Collaboration Tools ServiceNow, Microsoft Teams, SharePoint, Confluence
Process Frameworks ITIL, Change Management, Incident Response
Skills
Windows, System administrator, Vmware, Active directory, Systems engineering, Windows server, Linux, Infrastructure, Windows administration, Cloud, Office 365, Automation, Aws, Server administrator, Troubleshooting, Virtualization, Exchange, Administration
Top Skills Details
Windows,System administrator,Vmware,Active directory,Systems engineering,Windows server,Linux,Infrastructure,Windows administration,Cloud,Office 365
Additional Skills & Qualifications
Certs are preferred but not required.
Experience Level
Intermediate Level
Job Type & Location
This is a Contract to Hire position based out of San Diego, CA.
Pay And Benefits
The pay range for this position is $45.00 - $50.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully onsite position in San Diego,CA.
Application Deadline
This position is anticipated to close on Dec 19, 2025.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.
The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
About TEKsystems And TEKsystems Global Services
We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.
The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
