TEKsystems
Senior Systems Administrator
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3 days ago Be among the first 25 applicants.
Description The Senior 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 Senior System Administrator serves as a senior technical escalation point, mentors junior team members, and ensures adherence to corporate cybersecurity and compliance standards.
Skills vmware, vmware esxi, Windows, Linux, rhel 7, Active directory, System administrator, Systems engineering, Windows server, dns, dhcp
Additional Skills & Qualifications
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.
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.
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.
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.
Bachelor’s degree in Computer Science, Information Technology, or a related discipline (or equivalent professional experience).
Experience Level Expert Level
Job Type & Location This is a Contract position based out of San Diego, CA.
Pay And Benefits The pay range for this position is $60.00 - $65.00/hr.
Benefits
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 Nov 14, 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 regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
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3 days ago Be among the first 25 applicants.
Description The Senior 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 Senior System Administrator serves as a senior technical escalation point, mentors junior team members, and ensures adherence to corporate cybersecurity and compliance standards.
Skills vmware, vmware esxi, Windows, Linux, rhel 7, Active directory, System administrator, Systems engineering, Windows server, dns, dhcp
Additional Skills & Qualifications
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.
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.
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.
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.
Bachelor’s degree in Computer Science, Information Technology, or a related discipline (or equivalent professional experience).
Experience Level Expert Level
Job Type & Location This is a Contract position based out of San Diego, CA.
Pay And Benefits The pay range for this position is $60.00 - $65.00/hr.
Benefits
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 Nov 14, 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 regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
#J-18808-Ljbffr