SITEC Consulting is seeking motivated Junior and Mid-level Windows / Linux / VMware System Administrators to support a mission-focused government software hosting facility. This is an excellent opportunity for candidates who enjoy hands-on technical work across physical servers, virtual environments, operating systems, networking, security compliance, and customer support.
In this role, you will help deploy, maintain, secure, and troubleshoot critical infrastructure supporting a variety of customer missions. The ideal candidate is technically curious, comfortable working in a secure government environment, and eager to contribute to system reliability, security posture, and long-term infrastructure improvements.
As a System Administrator, you will support day-to-day operations, maintenance, and engineering activities across Windows, Linux, VMware, and related infrastructure. Responsibilities may include:
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Deploying and maintaining physical and virtual hardware infrastructure, including virtual machines and containers
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Performing routine maintenance, configuration changes, and troubleshooting across servers, workstations, and IT equipment
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Installing, configuring, and supporting hardware and software in a secure enterprise environment
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Managing system backups, disaster recovery planning, user accounts, and permissions
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Deploying, maintaining, and troubleshooting software applications
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Supporting customers by resolving technical issues and providing guidance on best practices
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Maintaining documentation, including knowledge base articles, incident response actions, system configurations, and administration procedures
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Securing information systems and applications in accordance with current DoD guidance
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Supporting RMF compliance activities, including scanning, STIG execution, remediation tracking, and routine security reporting
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Maintaining system configuration and security posture through continuous monitoring
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Participating in project planning and execution using Agile methodologies
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Providing networking support for on-premises infrastructure, including virtual networking environments
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Active Secret clearance with the ability to obtain a Top Secret clearance
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Ability to start with an interim Top Secret, if applicable
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U.S. Citizenship required
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2-5 years of hands-on experience with the following:
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Experience supporting Windows and/or Linux system administration
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Experience with Risk Management Framework (RMF) compliance activities
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Hands-on experience with security scanning, STIG execution, vulnerability remediation, or related security hardening activities
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CompTIA Security+ certification
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Windows or Linux operating system certification
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Familiarity with Linux operating systems and virtual networking concepts
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Strong troubleshooting, documentation, and customer support skills
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VMware / vSphere / ESXi administration
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Virtual networking
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System backups and disaster recovery
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Containers
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Active Directory
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Networking fundamentals and on-premises infrastructure support
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Experience working in secure DoD or government environments
This position offers the opportunity to work across a broad technical stack while supporting meaningful government missions. Candidates will gain exposure to infrastructure engineering, virtualization, cybersecurity compliance, RMF, STIGs, networking, and operational support in a collaborative environment.
Whether you are a junior administrator looking to grow or a senior-level professional ready to take ownership of complex systems, this role offers room to contribute, learn, and advance.
An active Secret clearance is required, with the ability to obtain a Top-Secret clearance. Candidates must be U.S. Citizens.
Join SITEC Consulting and help support secure, reliable, mission-critical infrastructure for government customers.
