Senior Systems Administrator

ALEX - Alternative Experts

Senior Systems Administrator managing and securing enterprise IT systems for federal clients. Ensuring system performance and compliance with cybersecurity standards, requiring advanced technical expertise.

Posted 6/16/2026full-timeHampton Roads • Virginia • 🇺🇸 United StatesSeniorWebsite

ATS Keywords

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Hard Skills

systems administrationcybersecuritysystem performance monitoringsystem security controlsvulnerability remediationoperating systems maintenancenetwork infrastructurecloud platformstroubleshootingsystem optimization

Soft Skills

problem-solvingability to manage competing prioritiescollaborationtechnical supportcommunication

Tools & Technologies

enterprise IT systemsserversnetworksapplicationsvirtualizationRMFATO processessystem documentationmission-critical applicationsprivileged account controls

Certifications & Qualifications

GSECSecurity+ CESSCPCCNA-SecurityCAPGSLCCISMCASP-CECISSPCEH

Industry Keywords

federal IT environmentDoD IT environmentscomplianceoperational continuitysystem accreditationcyber defenseCNSSI 4012CNSSI 4013CNSSI 4014U.S. Citizenship

Tech Stack

Tools & technologies

CloudCyber Security

About the role

Key responsibilities & impact

Support the management, maintenance, and security of enterprise IT systems in a federal environment
Ensure system performance, reliability, and compliance with cybersecurity standards
Require advanced technical expertise and the ability to operate within regulated environments supporting mission-critical systems

Requirements

What you’ll need

Administer, maintain, and secure enterprise IT systems, including servers, networks, and applications
Ensure system availability, performance, and operational continuity through proactive monitoring and troubleshooting
Implement and support system security controls in coordination with cybersecurity teams
Support system accreditation and compliance activities, including RMF-related requirements
Manage user access, permissions, and privileged account controls
Install, configure, and maintain operating systems and system software
Perform system updates, patching, and vulnerability remediation activities
Develop and maintain system documentation, including configurations and standard operating procedures
Support mission-critical applications and enterprise systems
Collaborate with cybersecurity, engineering, and support teams to ensure secure and efficient system operations
Provide technical support and resolve system incidents in a timely manner
Experience administering systems within secure or regulated environments
Demonstrated experience supporting system security, compliance, and operational continuity
Experience supporting federal or DoD IT environments
Familiarity with RMF, ATO processes, and system authorization requirements
Experience with enterprise environments, including virtualization, cloud platforms, or network infrastructure
Strong troubleshooting, problem-solving, and system optimization skills
Ability to manage competing priorities in a mission-focused environment
5 to 9 years of experience in systems administration, cybersecurity, or a related IT field
Candidates must possess certification(s) in one or more of the following areas: IAT Level II (Information Assurance Technical): GSEC, Security+ CE, SSCP, or CCNA-Security IAM Level II (Information Assurance Management): CAP, GSLC, CISM, CASP-CE, or CISSP (or Associate of CISSP) Cyber Defense (preferred but highly valued): CEH, GCIA, CSIH, or GCIH Operating System / Computing Environment Certification: Applicable Operating System/Computing Environment (OS/CE) certification for systems requiring privileged access
Education: Bachelor’s degree from an accredited institution; OR Certification aligned with CNSSI 4012, 4013, 4014, 4015, or 4016; OR Associate degree with a minimum of 10 years of relevant experience
U.S. Citizenship Required due to federal contract. No visa sponsorship (OPT/CPT included).

Benefits

Comp & perks

ALEX provides a variety of benefits designed to help meet the needs of our employees.