Senior Windows Systems Admin — DoD RMF Expert (Kauai)

Amentum; Waimea/Kamuela, Northern (HI, KY); Hybrid; USD 135,000 - 150,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Paid time off and holidays

401(k) retirement matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Tax-saving options

Disability and life insurance

Pet insurance

Job summary

Amentum is seeking a Sr. Systems Administrator (Windows) on Kauai, HI to oversee enterprise Windows infrastructure supporting Navy operations. The role demands strong RMF/NIST controls and leadership in secure system administration.

Responsibilities include managing AD, DNS, GPOs across domains, patch management, scripting, virtualization, and audit readiness with cybersecurity teams. Top Secret clearance preferred.

Qualifications

• Two years of System Administration/IT experience.
• Automation tools and scripting (PowerShell, Bash, Python).
• VMware/Nutanix certification or equivalent experience.
• Knowledge of DoW IT systems and Windows, RHEL infrastructure.
• Security-focused with RMF/DoW controls and DISA STIGs.

Responsibilities

• Administer Windows Server environments across classified and unclassified Navy networks.
• Manage AD, DNS, DHCP, and GPOs across multiple domains/enclaves.
• Apply RMF controls and ensure DISA STIG compliance.
• Patch management per DoW/Navy policies; automate with MECM/PowerShell.
• Support virtualization (VMware/Hyper-V) and lifecycle management.
• Develop PowerShell scripts for automation of tasks.
• Collaborate with cybersecurity for ATO, POAMs, audits.
• Maintain documentation, SOPs, baselines; mentor junior staff.

Skills

System Administration

RMF & NIST 800-53

Leadership

Cybersecurity concepts

PowerShell

Bash

Python

Education

Bachelor's Degree in CS or related field

High School with 8 years experience substituted

Tools

Active Directory

GPOs

VMware

Nutanix

MECM

ACAS

ESS

SCAP

Trellix

LogRhythm

MDE

Job description

Amentum is seeking a Sr. Systems Administrator (Windows) on Kauai, HI to oversee enterprise Windows infrastructure supporting Navy operations. The role demands strong RMF/NIST controls and leadership in secure system administration.

Responsibilities include managing AD, DNS, GPOs across domains, patch management, scripting, virtualization, and audit readiness with cybersecurity teams. Top Secret clearance preferred.