Systems Administrator – VMware & RMF Security Expert

SITEC Consulting, LLC.; Lexington Park (MD); On-site; USD 80,000 - 110,000; Full time

Job summary

SITEC Consulting, LLC. in Lexington Park, MD is seeking System Administrators across Junior, Journey, and Senior levels to support a government software hosting environment.

The role involves hands-on administration of physical and virtual infrastructure, server deployments, secure configurations, and problem resolution in a mission-focused environment. The team values strong operational hands-on skills in VMware, Windows/Linux, and DISA STIG/RMF compliance, with opportunities for growth across

Qualifications

• Hands-on System Administration experience in Windows, Linux, or mixed environments.
• Experience with ACAS vulnerability scanning and credentialing.
• Experience implementing or maintaining DISA STIGs and RMF compliance.
• Experience building, configuring, maintaining, or troubleshooting servers.
• Experience supporting virtualized infrastructure.
• Experience deploying and maintaining software applications.

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 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.

Skills

System Administration

ACAS scanning

RMF compliance

Active Directory

Networking concepts

Education

DoD 8570/8140 certification

Security+ or equivalent

Tools

VMware

Nessus

Windows Server

RHEL

Job description

SITEC Consulting, LLC. in Lexington Park, MD is seeking System Administrators across Junior, Journey, and Senior levels to support a government software hosting environment.

The role involves hands-on administration of physical and virtual infrastructure, server deployments, secure configurations, and problem resolution in a mission-focused environment. The team values strong operational hands-on skills in VMware, Windows/Linux, and DISA STIG/RMF compliance, with opportunities for growth across