SR. SYSTEMS ADMINISTRATOR (WINDOWS)
About The Position
Amentum is seeking a Sr. Systems Administrator (Windows) for a position on Kauai, HI. Highly experienced Senior Microsoft System Administrator to oversee and manage enterprise-level Microsoft infrastructure in support of U.S. Navy operations within a Department of War (DoW) environment. This role requires deep technical expertise in Microsoft systems, leadership in secure system administration, and a strong working knowledge of Risk Management Framework (RMF) and NIST SP 800-53 controls. The ideal candidate will demonstrate the ability to lead teams, manage complex environments, and ensure cybersecurity compliance across classified and unclassified networks.
Requirements
- Two (2) years of System Administration/IT experience
- Proficiency in automation tools and scripting (e.g., PowerShell, Bash, Python)
- VMware/Nutanix certification
- Knowledge/Administration of Trellix, LogRhythm, and MDE
- Experience with DoW systems and infrastructure
- Knowledge of Cyber Security Methods and Techniques
- Knowledge of DoW IT systems, to include Windows, RHEL, and comprehensive infrastructure concepts
- DoD 8570/8140 IAT II
- One of the following OS Certifications required: Windows, Azure Administrator Associate (Exam AZ-104), or Windows Server Hybrid Administrator Associate (Exam AZ-800 and AZ-801)
- Must be able to obtain and maintain a Top Secret US Government Clearance. US Citizenship is required to obtain and maintain a Top Secret Clearance.
Nice To Haves
- Advance certifications may be substituted for a degree or experience
- Advance knowledge and certification in both Windows Server and RHEL is considered highly desired
Responsibilities
- Administer and maintain Microsoft Windows Server environments in classified and unclassified environments across Navy networks.
- Manage Active Directory, DNS, DHCP, and Group Policy Objects (GPOs) across multiple domains and enclaves.
- Implement and maintain RMF security controls and ensure systems are compliant with DISA STIGs and DoW cybersecurity policies.
- Apply and manage patches and updates across all Microsoft systems in accordance with DoW and Navy patch management policies.
- Manage automated installation methods and system imaging (e.g., MECM, VMware, Nutanix)
- Perform system hardening, patching, and vulnerability remediation using tools such as ACAS, ESS, and SCAP.
- Develop and maintain PowerShell scripts for automation of administrative tasks and system configuration.
- Support virtualization platforms (VMware, Hyper-V) and manage virtual infrastructure lifecycle.
- Collaborate with cybersecurity teams to support ATO packages, POA&Ms, and audit readiness.
- Maintain system documentation, configuration baselines, and standard operating procedures (SOPs).
- Provide mentorship to junior administrators and IT support staff.
- Participate in Change Control Boards (CCBs) and Configuration Management Boards (CMBs).
- Assist with incident response, forensic analysis, and system recovery efforts.
- Support backup and disaster recovery strategies using enterprise tools (e.g., Veeam, Commvault).
- Evaluate and recommend new Microsoft technologies and DoW-approved tools to improve system performance and security.
- Perform other duties as assigned.
Benefits
- 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
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What This Job Offers
Job Type
Full-time
Career Level
Senior
