Sr. Windows and Linux Multi - Discipline SysAdmin

Date Posted: 2026-07-13 Country: United States of America Location: US-CA-EL SEGUNDO-R01 ~ 2000 E Imperial Hwy ~ BLDG R01 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance​ Security Clearance Type: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1 At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.  Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world.  What You Will Do : Provide IT systems administration in a heterogeneous Microsoft Windows and RedHat Enterprise Linux environment.  Experience with Windows Server internals or Linux fundamentals to include DNS, DHCP, AD, and server replication methods. Working as a team member in a fast-paced technological environment.  Use troubleshooting techniques to resolve technical problems of moderate to high scope and complexity to include the integration of hardware and operating systems (OS). Understanding data RAID, data backup uses and technologies. Install and configure software applications requested by end users Work with Cybersecurity professionals to maintain security requirements. Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification) within 6 months of start date.  Systems are operational 24x7 and occasionally require work effort beyond standard work hours. Travel required as business needs dictate to other US Domestic locations, up to 10% per year.  Full time 100% Onsite position. What You Will Learn: Experience Deploying Windows workstations and migrating end-user data. Knowledge of operating system concepts and implementations Microsoft Windows Active Directory Services administration and support (e.g. user and computer objects administration, Group Policy). Understanding of network services as related to Microsoft Windows environment (e.g. DC, DNS, DHCP, etc.). UNIX and Linux systems. VMware VSphere (ESXi, vCenter, etc). Chef, Ansible, Puppet, CFEngine, etc. Cross-domain solutions. Systems deployment, administration, performance tuning, and monitoring. Automation via scripting. Infrastructure as Code (IaC). Storage – NetApp FAS8000. Qualifications You Must Have: Typically requires a University degree or equivalent experience and a minimum of 5 years of prior relevant experience or an Advanced Degree in a related field and minimum 3 years experience. Active and transferable U.S. government issued Secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. Windows and/or Linux systems administration experience. Qualifications We Prefer: Active Top Secret security clearance. Bitlocker support. Windows command line and related utilities. Network and infrastructure services such as domain controllers, global catalogs, DNS, and DHCP. Infrastructure backup, restore, disaster recovery and business continuity. Cloud computing (AWS, Azure). Experience with the following Microsoft technologies: MDT/WSUS/MECM; Windows desktops (Windows 10 & 11), Horizon. Support experience with engineering applications such as MatLab, Green Hills products, Doors, and Subversion. CompTIA Security+ certification or other industry-recognized certifications relevant to a Windows System Administrator. Infrastructure backup, res.tore, disaster recovery and business continuity. Network and infrastructure services such as domain controllers, global catalogs, DNS, and DHCP. ITIL Foundations and/or ITIL Service Operations. What We Offer: Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation. Learn More & Apply Now! As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. The salary range for this role is 95,500 USD - 181,700 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term d