System Administrator - Multiple Openings

About the role

SITEC Consulting is seeking System Administrators to support a mission-focused government software hosting environment. We are looking for hands-on administrators with experience supporting physical and virtual infrastructure, deploying servers and applications, maintaining secure system configurations, and troubleshooting complex technical issues. Multiple experience levels are being considered, with a particular need for Journey-level System Administrators. Strong Junior and Senior candidates are also encouraged to apply.

Responsibilities

• Deploy, configure, administer, and maintain physical and virtual server infrastructure.
• Build and configure Windows and/or Linux servers for operational environments.
• Deploy and manage virtual machines using VMware, ESXi, and vSphere.
• Support virtual networking, storage, containers, and other enterprise infrastructure technologies.
• Install, configure, deploy, maintain, and troubleshoot software applications.
• Perform system maintenance, patching, configuration changes, and vulnerability remediation.
• Conduct ACAS scanning, credentialed scans, vulnerability analysis, and remediation activities.
• Apply and maintain DISA STIGs and support Risk Management Framework (RMF) compliance requirements.
• Maintain the security and configuration posture of information systems through continuous monitoring and routine security activities.
• Configure and manage user accounts, permissions, groups, and access controls.
• Support Active Directory and related enterprise identity services.
• Maintain system backups and support disaster recovery and system restoration activities.
• Troubleshoot hardware, software, server, virtualization, networking, and application issues.
• Provide technical support and guidance to customers and internal teams.
• Maintain technical documentation, including system configurations, knowledge-base articles, incident response actions, and administrative procedures.
• Support networking requirements within on-premises infrastructure.
• Participate in technical planning and Agile project activities.

Required Qualifications

• Hands-on System Administration experience in Windows, Linux, or mixed operating-system environments.
• Experience with ACAS vulnerability scanning and credentialing.
• Experience implementing or maintaining DISA STIG