Principal System Administrator (ONSITE)

RTX•Marlborough, MA

3d•$86,800 - $165,200•Onsite

About The Position

Principal System Administrator based in Marlborough, MA, internally known as Principal Specialist, Information Workplace Services collaborate and support exciting, critical programs with classified information system capabilities. Success in this role means you can develop, implement, and maintain secure, cost-efficient environments across various classified programs. Program teams rely on your collaboration and guidance to define computing requirements and create end-to-end solutions to solve complex IT infrastructure problems.

Requirements

Bachelor’s degree with a minimum of 5 years of relevant experience, or an advanced degree with a minimum of 3 years of relevant experience.
Active and transferable U.S. government issued security clearance is required prior to start. U.S. citizen is required, as only U.S. citizenship are eligible for a security clearance
Experience administering and securing Windows and RHEL servers.
Experience with VMware virtualization.
Experience with securing system configurations, system hardening.
Experience with PowerShell scripting.

Nice To Haves

Experience serving as a technical SME or primary point of contact for patching, vulnerability remediation, or compliance initiatives.
Hands-on experience with MECM/SCCM, PXE boot services, OS imaging, and automated software deployment frameworks.
Familiarity with NetApp storage and/or HPC environments.
Experience with enterprise Windows services, including Active Directory, Group Policy, and identity integration.
Familiarity with cybersecurity and compliance tooling, such as ACAS, SCAP, Splunk, STIG Viewer, and audit support processes.
Experience supporting or integrating with DevSecOps environments, including Kubernetes, Rancher, and artifact repositories.
Experience with SQL Server, including clustered configurations.

Responsibilities

Serve as a Principal Systems Administrator supporting Windows and Linux enterprise environments, responsible for the design, implementation, maintenance, patching, and troubleshooting of Windows Server, Windows 11, RHEL 7/8/9, and virtualized infrastructure within a large-scale, mission-critical environment operating 24x7x365.
Experience with Windows and Linux patching, vulnerability remediation, and compliance activities, including STIG/EVAL STIG implementation, SCAP/ACAS support, log collection, and close coordination with Cyber Security teams to maintain continuous compliance with DoD and regulatory requirements.
Design, deploy, and maintain virtual infrastructure using VMware ESXi and vCenter, including VM lifecycle management, host upgrades, performance tuning, and support of critical production workloads.
Engineer and sustain enterprise imaging, deployment, and automation solutions, including MECM/SCCM, PXE, Windows imaging, in-place OS upgrades, and scripted software deployment using PowerShell and automation frameworks.
Administer and support core Windows services and integrations, including Active Directory, Group Policy, secure system configurations, certificate-based authentication, and customized user environments.
Collaborate across Digital Technology, Engineering, Cyber Security, DevSecOps, Networking, Storage, and Tools teams to resolve complex infrastructure, integration, and compliance challenges, while operating independently with minimal oversight.
Support both planned and emergent operational needs in a fully on-site DoD closed-area environment, including occasional after-hours support and up to 10% travel as required to meet program objectives.
Work independently, prioritize competing demands, and execute with minimal direction in a fast-paced operational environment.
Must obtain DoDD 8140/8570 baseline certification (CompTIA Security+ or equivalent) within 6 months of starting date.
Position requires 100% onsite work in a closed area, with up to 15% travel to supported RTX locations in MA, RI, and NH (typically within 45–90 minutes).

Benefits

Relocation assistance available, provided final candidate meets eligibility requirements
medical
dental
vision
life insurance
short-term disability
long-term disability
401(k) match
flexible spending accounts
flexible work schedules
employee assistance program
Employee Scholar Program
parental leave
paid time off
holidays