Principal Linux Systems Administrator, Tewksbury, MA

Principal Linux System Administrator Principal Linux System Administrator based in Tewksbury, MA, also known as Principal Analyst – Infrastructure, collaborates with many teams to support critical programs that handle classified information. The role requires developing, implementing, and maintaining secure, cost‑efficient environments across a range of classified programs. Responsibilities Provide systems administration on heterogeneous Red Hat Enterprise Linux and Microsoft Windows platforms. Configure and manage Linux fundamentals and Windows Server internals, including Ansible, DNS, DHCP, LDAP, AD, and server replication. Install, configure, and troubleshoot hardware and operating systems, including RAID arrays and backup technologies. Install and configure software applications on behalf of end users. Collaborate with cybersecurity professionals to maintain security requirements, produce documentation, and deliver training. Develop solutions and documentation to solve a variety of technical problems. Support 24/7 system operations, including occasional work outside standard hours. Travel up to 10% to other U.S. domestic locations as business needs dictate. Obtain Department of Defense Directive (DoDD) 8140 / 8570 certifications (CompTIA Security+ CE or equivalent) within six months of start date. Qualifications Minimum 5 years of relevant experience; or an advanced degree with a minimum of 3 years of relevant experience. Must obtain and maintain a U.S. government‑issued security clearance; U.S. citizenship is required. Proven experience with Linux systems. Experience with LDAP/Active Directory, VMware, MySQL, or networking administration. Ability to obtain DoD Secret clearance. CompTIA Security+ CE or equivalent, and an operating system certification. Preferred Qualifications Experience with VMware vCenter, vSphere, ESX, or other virtual computing methods. Experience with NISPOM, JAFAN, JSIG, DFARS, and/or DoD/RMF. Knowledge of NIST or DoD security frameworks. Experience with NAS/SAN storage technologies and solutions. Experience with IT project lifecycle management processes. Experience with Microsoft WSUS, MECM, or Exchange. High Performance Computing (HPC) experience in a Linux environment. Scripting experience. Experience supporting engineers in software, simulations, and hardware development. Compensation & Benefits Salary range: 86,800USD–165,200USD. Benefits include 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. Additional incentive compensation may be available at the discretion of the company. Work Location Full‑time, 100% onsite position in Tewksbury, MA. Travel up to 10% to other U.S. domestic locations. 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 Segment (Twilio)