It System Administrator jobs in United States

• Administer and monitor on-premises and cloud-based servers (Windows / Linux).
• Manage Active Directory, DNS, DHCP, Group Policy, and user accounts.
• Oversee network infrastructure : firewalls, routers, switches, and VPNs.
• Ensure security best practices including patch management, backup, and disaster recovery.
• Maintain hardware inventory and ensure lifecycle management of IT assets.
• Monitor system performance and perform tuning to maintain efficiency.
• Install, configure, and support enterprise applications and services (., Exchange, Microsoft 365, Azure, VMware).
• Coordinate with vendors and service providers for issue resolution and procurement.
• Respond to incidents, perform root cause analysis, and document resolutions.
• Create and maintain IT documentation (network diagrams, SOPs, configuration guides).
• Assist with IT audits and compliance requirements (ISO 27001, GDPR, .

Qualifications :

• Bachelor’s degree in Computer Science, Information Technology, or related field.
• 3–5 years of proven experience in IT system administration or a similar role.
• Strong knowledge of Windows Server, Linux, Microsoft 365, and networking protocols.
• Experience with virtualization (VMware, Hyper-V) and cloud platforms (Azure, AWS).
• Familiarity with security tools (endpoint protection, SIEM, MFA, backup solutions).
• Excellent troubleshooting and communication skills.

Certifications preferred : MCSA, MCSE, CompTIA Network+, Azure Administrator, or RHCSA .

Preferred Skills :

• PowerShell or Bash scripting for automation.
• Experience with monitoring tools (Zabbix, PRTG, SolarWinds, New Relic).
• Understanding of ITIL framework and ticketing systems (., ServiceNow, Jira).
• Ability to manage multiple tasks and prioritize in a dynamic environment.

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