Sr. Principal System Administrator
Relha LLC
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: DoD Clearance: Top Secret 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. Sr. Principal Linux Systems Administrator, in Infrastructure Workplace Services, will lead and collaborate with a diverse team to support fast-paced, critical programs with classified information system capabilities. Success in this role means you can develop, implement and maintain secure, cost-eff"icient 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. What You Will Do: Manage and optimize Red Hat Enterprise Linux infrastructure, ensuring reliable and secure IT operations. Act as a senior technical resource for the team to maintain confidentiality, integrity, and availability of assigned IT systems and applications. Partner with Cybersecurity teams to maintain compliance with security requirements and provide documentation, training, and guidance on advanced IT processes and procedures. Mentor and guide junior administrators across a broad range of responsibilities, including corrective and preventive maintenance, routine operational tasks, account management, and system performance tuning. Lead and contribute to technical meetings with internal teams and program stakeholders, providing technical guidance and best practice to ensure successful outcomes. Develop, document, and enforce system administration processes, standards, and best practices. Participate in Change Request reviews and serve on Change Management Boards at various program levels. Must be able to obtain Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification). Systems are operational 24x7 and occasionally require work effort beyond standard work hours. Travel required up to 5% Full time 100% Onsite position Qualifications You Must Have: Typically requires a University degree or equivalent experience and a minimum of 2 years of prior relevant experience, or an Advanced Degree in a related field. Active and transferrable final U.S. government issued Top Secret security clearance is required prior to start date with the ability to obtain program access after start. US citizenship is required, as only U.S. citizens are eligible for a security clearance.”. **Specific Customer Clearance required before a start date will be established** Experience mentoring both individuals and teams. Qualifications We Prefer: An active DoD TS Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification). Experience with any of the following technologies: VMware, OpenShift, Kubernetes, Docker, Tanzu, Podman, Infrastructure as Code (Terraform and/or Ansible), Windows administration. Experience supporting engineers in software, simulations, and hardware development. Experience working with NISPOM, JAFAN, JSIG, and/or DoD/RMF guidelines. 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. Hired applicants may be eligible for benefits, including but not limited to, 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, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. 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 Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. 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 Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. 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. #J-18808-Ljbffr Relha LLC
$107.5k - $204.5k
...deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.Sr. Principal Linux Systems Administrator, in Infrastructure Workplace Services, will lead and collaborate with a diverse team to support fast-paced, critical...PrincipalSeniorFull timeTemporary workWork experience placementWork at officeRemote workFlexible hours$107.5k - $204.5k
...deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. Sr. Principal Linux Systems Administrator, in Infrastructure Workplace Services What You Will Do Manage and optimize Red Hat Enterprise Linux...PrincipalSeniorFull timeTemporary workWork experience placementWork at officeRemote workFlexible hours- Raytheon in Plano, Texas, is seeking a Sr. Principal Linux Systems Administrator for Infrastructure Workplace Services. You will manage and optimize Red Hat Enterprise Linux infrastructure, ensuring reliable and secure IT operations, and act as a senior technical resource...PrincipalSenior
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$130k - $180k
Sr. Principal Data Scientist / Machine Learning Engineer Ascentt Plano USD 130,000 - 180,000 Sr. Principal Data Scientist / Machine Learning Engineer Ascentt is building cutting-edge data analytics & AI/ML solutions for global automotive and manufacturing leaders. We turn...PrincipalSenior$86.8k - $165.2k
...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 RedHat Enterprise/Microsoft Windows environment.Lead and coordinate the RedHat Installation and...PrincipalFull timeTemporary workWork experience placementWork at officeRemote workFlexible hours- ...Pratt & Whitney seeks a Senior Principal Software Architect to lead the design of real-time embedded software for mission-critical VLF transmitters. You will work across software, systems, and hardware teams to ensure robust, secure, and high-performance solutions....PrincipalSenior
$132.4k - $251.6k
...Clearance Status: Active and existing security clearance required on day 1At Collins Aerospace, we don’t just build systems; we build the future. As a Senior Principal Systems Engineer, you’ll support programs involved in modernizing the U.S. Air Force Nuclear Command, Control...PrincipalSeniorTemporary workWork experience placementWork at officeRemote workRelocationFlexible hours$86.8k - $165.2k
...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 RedHat Enterprise/Microsoft Windows environment. Lead and coordinate the RedHat Installation and...PrincipalFull timeTemporary workWork experience placementWorldwideFlexible hours- ...end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Sr. Principal, Counsel Job Code: 39781 Job Location: Greenville TX, Plano TX, Waco TX, or Rockwall TX (100% on site) Job Schedule: 1st...PrincipalSeniorContract workFor subcontractorLocal areaDay shift
- JPMorganChase is seeking a Senior Principal Cybersecurity Architect to lead the cybersecurity strategy and development of AI-enabled products across the Consumer & Community Banking portfolio. You will articulate risk and mitigation options, collaborating with teams to...PrincipalSenior
- ...Position: Senior System Administrator Location: Richardson, TX 75080 Must-Haves: # Experience Working for an MSP (5+ years) # Strong Microsoft Azure experience (5-7+ years) # Strong Microsoft 365, Teams, SharePoint experience (5-7+ years)...Senior
- Collins Aerospace’s Strategic Solutions team seeks a Senior Principal Software Product Owner/Release Train Engineer to lead mission-critical software for U.S. armed forces in a DevSecOps cloud environment. The role blends Product Owner, Control Account Manager, and RTE...PrincipalSenior
- Rehrig Pacific Company, Inc. in Richardson, TX is seeking a Principal Software Engineer to lead design and delivery of scalable enterprise... ..., and secure integrations across ERP/CRM and manufacturing systems while ensuring performance, reliability, and security. As a senior...PrincipalSenior
- Capital One National Association in Plano, TX is seeking a Principal Associate, Process Manager for Auto and Dealer Risk to lead process improvement initiatives and deliver operational excellence. You will collect data, analyze results, and drive improvements that impact...PrincipalSenior
- Prestige Staffing is seeking a Systems Administrator to support a leading SaaS provider in the homeowners association industry. This hybrid role is based in Richardson, TX, and offers growth within a stable, respected company. The ideal candidate will manage enterprise...Senior
$132.4k - $251.6k
...Status: Active and existing security clearance required on day 1 At Collins Aerospace, we don't just build systems; we build the future. As a Senior Principal Systems Engineer , you'll support programs involved in modernizing the U.S. Air Force Nuclear Command,...PrincipalSeniorTemporary workWork experience placementWork at officeRemote workRelocationFlexible hours- Advanced Integration Technology in Plano, TX seeks an Enterprise Systems Administrator to oversee the administration, integration, and continuous improvement of the company’s enterprise app portfolio (IFS, SugarCRM, GURU, PLM/CAD connectors) and related databases. Responsibilities...Senior
$159.75k - $225.5k
...moments that reflect who they uniquely are.We are seeking a Senior Principal Software Engineer to lead the design and development of next-... ...for shaping the architecture, design and implementation of AI systems that directly drive conversion, customer satisfaction, and long...PrincipalSeniorRemote work$86.8k - $165.2k
Join to apply for the Principal System Administrator role at Raytheon . Location: TX190: 2501 West University, McKinney, TX, 75070 USA Date Posted: 2026-01-08 What You Will Do Provide IT systems administration in a heterogeneous Microsoft Windows and Redhat Enterprise...PrincipalTemporary workWork experience placementRelocationFlexible hours- L3Harris is looking for a Sr. Principal, Counsel based in Plano, TX. This role involves providing strategic legal counsel within the Intelligence, Surveillance and Reconnaissance sector. The candidate will manage legal risks, offer guidance on contracts, and ensure compliance...PrincipalSeniorContract work
- ...create and expand the delivery of personalized health support that people didn't even know could be possible. The Senior System Administrator for Stellus Rx will be a key member of our Technology Team , working closely with leaders and across the organization to...Senior
- ...other and the communities we serve.The OpportunityAs a Senior Principal Digital SoC Architect, you will be the driving force behind the... ...and execution strategy of Allegro’s next-generation mixed-signal Systems-on-Chip (SoCs). Operating at the pinnacle of our technical...PrincipalSeniorFull timeWork at officeNight shift
- Senior Principal Software Product Owner/Release Train Engineer (RTE) Strategic Solutions - Collins Aerospace, Richardson, TX U.S. citizenship... ...Act as the Release Train Engineer for the Mission Systems Software team, facilitating PI planning, backlog refinement, and...PrincipalSeniorRelocation package
- Job Overview:Keurig Dr Pepper is seeking a Sr. Principal Solution Architect to lead the design and implementation of advanced technology solutions... ...a strong understanding of business goals, processes, and system integration to deliver scalable, resilient, and maintainable...PrincipalSenior
$93.5k - $156.45k
...an experienced and highly technical Senior Information Security Principal with 6 to 7 years of expertise in Vulnerability Management,... ...standards.Excellent problem-solving skills, with a focus on long-term system sustainability.Ability to establish trust relationships and...PrincipalSenior$132.4k - $251.6k
...segments. APS supplies mission equipment directly to original equipment manufacturers and government entities for integration on larger systems.Raytheon’s Electronic Warfare Systems (EWS) is seeking a motivated, Program Chief Engineer (PCE), for their Electronic Warfare...PrincipalSeniorTemporary workWork experience placementWork at officeRemote workRelocation packageFlexible hours$132.4k - $251.6k
Job ID: 01850029Posted: Posted 30+ Days AgoStart Date: 2026-06-18Location: US-TX-MCKINNEY-513WZS ~ 2501 W University Dr ~ WZS BLDGCountry: United States of AmericaTime Type: Full timeDate Posted:2026-06-18 Country:United States of America Location:US-TX-MCKINNEY-513WZS...PrincipalSeniorContract workTemporary workWork experience placementWork at officeRemote workFlexible hours
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