Sr. Principal System Administrator ONSITE

Position Overview

Sr. Principal Systems Administrator Lead – Onsite in Tewksbury, Massachusetts. The role requires managing a heterogeneous Microsoft Windows and Red Hat Enterprise Linux server infrastructure, mentoring staff, ensuring secure and compliant operations for classified programs.

• Manage and optimize a heterogeneous Windows and Linux server infrastructure.
• Mentor and guide junior administrators on maintenance, operational tasks, account management, and performance tuning.
• Lead a team to maintain confidentiality, integrity, and availability of assigned IT systems and applications.
• Configure administrator and service accounts, maintain system documentation, tune performance, install enterprise software, and manage computing and storage resources.
• Partner with Cybersecurity teams to maintain compliance and provide documentation, training, and guidance on advanced IT processes.
• Participate in Change Request reviews and serve on Change Management Boards.
• Coordinate technical and process document reviews, troubleshoot, and resolve system administration, engineering, and integration issues.
• Lead and contribute to technical meetings with internal teams and program stakeholders.
• Participate in operations 24/7 and occasional off‑hours work; travel to other U.S. domestic locations up to 10% of the time.

• University degree or equivalent experience with a minimum of 8 years of related experience, or advanced degree with at least 5 years of relevant experience.
• Active and transferable U.S. government‑issued security clearance on day
  1.
• U.S. citizenship.
• Experience with Active Directory Domain Services, VMware vCenter/vSphere, Red Hat Enterprise Linux, Windows Client and Server, TCP/IP, DNS.
• Experience leading and mentoring teams.
• Must obtain DoDD
  8140/8570 certification (CompTIA Security+ CE or equivalent) within a reasonable timeframe.

• Organizational skills, attention to detail, time management, multitasking.
• Experience with NISPOM, JAFAN, JSIG, and/or DoD/RMF guidelines.
• Experience with Storage Area Network (SAN) and Network Attached Storage (NAS) systems.
• Experience with configuration and maintenance of networking switch and firewall devices.
• Experience with legacy systems such as Solaris8/9/10, Microsoft Server
  2008/2012/2016, Windows NT/XP/7, Red Hat Enterprise Linux4/5/6.

• Base salary range: $107,500 - $204,500
  
  USD.
• Benefits including medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, employee assistance program, parental leave, paid time off, holidays, and more.
• Relocation assistance (if eligible).
• Opportunity to work on classified programs with advanced technology.

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, veteran status, or any other protected class.