Principal System Administrator, LADS, Tewksbury, MA Onsite

Principal System Administrator (LADS) – Tewksbury, MA – Onsite, Full‑time. Role requires an active U.S. Secret security clearance and U.S. citizenship. Responsibilities Serve as Principal Systems Administrator for Windows and Linux enterprise environments, responsible for design, implementation, maintenance, patching, and troubleshooting of Windows Server, Windows 11, RHEL 7/8/9, and virtualized infrastructure. Operate in a 24x7x365 mission‑critical environment. Perform Windows and Linux patching, vulnerability remediation, and compliance activities (e.g., STIG/EVAL, SCAP/ACAS, log collection). Coordinate 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 such as MECM/SCCM, PXE, Windows imaging, in‑place OS upgrades, and scripted software deployment with 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 with Digital Technology, Engineering, Cyber Security, DevSecOps, Networking, Storage, and Tools teams to resolve complex infrastructure, integration, and compliance challenges. Provide planned and emergent operational support in a fully on‑site DoD closed‑area environment, including occasional after‑hours support and up to 10% travel. Work independently, prioritize competing demands, and execute with minimal direction in a fast‑paced operational environment. Required Qualifications University degree or equivalent experience with a minimum of 5years of relevant experience, or an advanced degree with a minimum of 3years of relevant experience. Active, transferable U.S. government‑issued Secret security clearance and U.S. citizenship. Experience administering and securing Windows and RHEL servers. Experience with VMware virtualization. Experience with securing system configurations and system hardening. Experience with PowerShell scripting. Preferred Qualifications 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. Prior experience supporting DoD, defense, or highly regulated environments. Benefits Competitive salary (US$86,800–$165,200) and comprehensive benefits package, including medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, parental leave, paid time off, and holidays. Specific benefits depend on the business unit and collective‑bargaining agreement status. Equal Opportunity Employer RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified individuals with a disability and protected veterans in compliance with Section503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. #J-18808-Ljbffr