IT Systems Administrator

Amentum

. Administer, operate, monitor, and maintain DoD enterprise IT systems, networks, servers, and end-user computing environments .

Posted 10/16/2026full-timeKaneohe • Hawaii • United StatesMid-LevelSenior💰 $140,000 - $160,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in administering and maintaining DoD enterprise IT systems, with a strong focus on cybersecurity, network administration, and technical documentation. Proficient in troubleshooting complex hardware and software issues while ensuring compliance with DoD security requirements.

Highest-signal resume keywords

Windows AdministrationNetwork AdministrationCybersecurity ComplianceTechnical DocumentationDoD 8140 Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Systems AdministrationNetwork TroubleshootingActive Directory ManagementTCP/IP NetworkingVulnerability RemediationPatching and BackupsConfiguration ManagementIncident ResponseDisaster RecoveryVirtualization

Soft Skills

Effective CommunicationTeam CollaborationIndependent Work

Tools & Technologies

ServiceNowPowerShellVMwareMicrosoft 365Windows ServerEnterprise Network EquipmentMonitoring ToolsDISA STIGs

Certifications & Qualifications

Security+CCNACySA+CASP+/SecurityXCISSP

Industry Keywords

DoDClassified NetworksMilitary IT SupportFederal EnvironmentsJoint Operations

Tech Stack

Tools & technologies

Cyber SecurityDNSPythonServiceNowSwitchingTCP/IPVMware

About the role

Key responsibilities & impact

Administer, operate, monitor, and maintain DoD enterprise IT systems, networks, servers, and end-user computing environments
Install, configure, upgrade, troubleshoot, and maintain Windows and other operating systems and associated applications
Support LAN/WAN, routing, switching, DNS, DHCP, Active Directory, virtualization, storage, and enterprise services
Diagnose and resolve complex hardware, software, network, and connectivity problems
Perform system configuration, account administration, access management, patching, backups, and system recovery
Support cybersecurity requirements, vulnerability remediation, security configuration, auditing, and system hardening
Maintain technical documentation, system diagrams, standard operating procedures, configuration records, and troubleshooting guides
Monitor system performance and availability and identify operational or security issues
Coordinate with cybersecurity, network operations, service desk, systems engineering, and infrastructure teams
Support approved technical solutions and changes in accordance with DoD policies and organizational procedures
Provide technical assistance to military, government civilian, and contractor personnel
Participate in incident response, problem management, change management, and continuity-of-operations activities
Provide after-hours, on-call, exercise, or operational support when required by mission requirements
Perform other IT duties supporting US PACOM mission requirements
Support the J83 Edge Theater Architecture team at MCAS Kaneohe Bay and report administratively to the Amentum Project Lead

Requirements

What you’ll need

Bachelor’s degree in Information Technology, Computer Science, Information Systems, Cybersecurity, Engineering, or a related technical field, or equivalent combination of education, training, and experience
3+ years of professional IT experience in systems administration, network administration, infrastructure support, enterprise IT, or a related discipline
Current Security+, CCNA, CySA+, CASP+/SecurityX, CISSP, or other DoD 8140-recognized certification appropriate to the position
Demonstrated experience supporting Windows and/or other operating systems
Working knowledge of TCP/IP networking, DNS, DHCP, routing, switching, and network troubleshooting
Experience with Active Directory and enterprise user/account administration
Experience troubleshooting hardware, software, operating-system, and network problems
Ability to document technical issues, solutions, configurations, and procedures clearly
Ability to work independently and as part of a multidisciplinary technical team
Ability to communicate effectively with technical and non-technical personnel
Ability to work in a controlled classified environment and comply with DoD security requirements
Ability to obtain and maintain additional certifications or qualifications required for the assigned DoD 8140/DCWF work role
Active Top Secret security clearance, with SCI eligibility later during employment
U.S. citizenship required to obtain a Top Secret clearance
Preferred: 5+ years of IT experience supporting DoW, Joint, military, intelligence, or other federal environments
Preferred experience supporting classified networks or systems
Preferred experience with DISA STIGs, vulnerability scanning/remediation, VMware, Microsoft Active Directory, Group Policy, Windows Server, Microsoft 365, enterprise network equipment, monitoring tools, backup/disaster recovery, ticketing and IT service-management processes, ServiceNow, PowerShell, Python, and operational military headquarters

Benefits

Comp & perks

Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits, including 401(k) matching
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance