Systems Administrator

Sr. Systems Administrator (Windows)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.ResponsibilitiesAdminister 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.Physical Elements/EnvironmentLifting, Pushing/Pulling: 25 - 50lbsWork positions requirements: walking, standing, crawling, kneeling, cramped, sitting and work requiring repeated stooping or frequent climbing.Environment: customer contact, extended workday, confined work area, office laboratory, field assignment, and inclement weather.Minimum QualificationsExperienceTwo (2) years of System Administration/IT experienceAdvance certifications may be substituted for a degree or experienceProficiency in automation tools and scripting (e.g., PowerShell, Bash, Python)VMware/Nutanix certificationKnowledge/Administration of Trellix, LogRhythm, and MDEExperience with DoW systems and infrastructureKnowledge of Cyber Security Methods and TechniquesKnowledge of DoW IT systems, to include Windows, RHEL, and comprehensive infrastructure conceptsEducationBachelor's Degree in computer science or related technical discipline.High School or equivalent with eight (8) years of system administration experience may be substituted for a bachelor's degree.CertificationsDoD 8570/8140 IAT IIOne of the following OS Certifications required- Windows- Azure Administrator Associate (Exam AZ-104)- Windows Server Hybrid Administrator Associate (Exam AZ-800 and AZ-801)Preferred QualificationsAdvance knowledge and certification in both Windows Server and RHEL is considered highly desiredSecurity Clearance Must be able to obtain and maintain a Top Secret US Government Clearance. Note: US Citizenship is required to obtain and maintain a Top Secret Clearance. Applicants selected either must currently possess a Top Secret clearance or will be subject to a US Government Security Investigation and must meet eligibility requirements to obtain clearance prior to commencement of employment and maintain a security clearance for access to classified information or Closed/Restricted Areas throughout duration of employment.Compensation Details:$135K - $150KThe compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.Benefits Overview:Health, dental, and vision insurancePaid time off and holidaysRetirement benefits (including 401(k) matching)Educational reimbursementParental leaveEmployee stock purchase planTax-saving optionsDisability and life insurancePet insuranceNote: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.