Linux System Administrator (Onsite) (Top Secret Clearance)

In this role, you will serve as a Linux infrastructure engineer supporting the design, deployment, automation, security, and sustainment of enterprise-class compute and virtualization platforms across secure and highly regulated environments. The role focuses on delivering resilient, scalable, and compliant infrastructure solutions supporting development, engineering, and mission-critical operations within classified and air-gapped environments., * Design, deploy, harden, and maintain enterprise Linux infrastructure environments utilizing RHEL 8, RHEL 9, and Rocky Linux.

• Engineer and support physical and virtualized infrastructure platforms utilizing KVM virtualization technologies.
• Support secure, air-gapped development, testing, and production environments with a focus on operational stability and compliance.
• Develop and maintain Infrastructure-as-Code (IaC) automation solutions utilizing Ansible.
• Design, deploy, and administer on-premises cloud infrastructure platforms utilizing Apache CloudStack.
• Implement and maintain enterprise storage, backup, and distributed storage solutions including RAID and GlusterFS technologies.
• Administer and troubleshoot enterprise Linux application hosting environments including Apache HTTP Server.
• Perform system patching, STIG hardening, SELinux administration, firewalld configuration, and vulnerability remediation activities.
• Troubleshoot complex Linux kernel, networking, storage, virtualization, and infrastructure performance issues.
• Support observability and monitoring initiatives utilizing technologies such as Grafana, OpenTelemetry, and Prometheus.
• Collaborate with Cyber, Engineering, Architecture, and Infrastructure teams to ensure systems remain compliant, secure, and operationally effective.
• Support infrastructure modernization initiatives, automation efforts, and operational improvement activities across enterprise environments.
• Provide technical guidance and mentorship to junior administrators and engineers to enhance team technical capability and operational maturity.

A successful candidate brings extensive hands-on experience with Linux platform engineering, virtualization technologies, automation frameworks, and private cloud infrastructure. Strong expertise in infrastructure hardening, operational reliability, and secure systems administration is essential.

You will leverage your technical expertise to modernize infrastructure platforms, automate operational processes, improve system reliability, and support highly available enterprise services across distributed environments., * Typically requires a University Degree and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience.

• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• 5+ years of professional experience in Linux systems engineering, systems administration, or infrastructure engineering
• Active Top Secret Security Clearance.
• CompTIA Security +
• Extensive hands-on experience supporting:

• RHEL 8 / RHEL 9
• Rocky Linux
• KVM virtualization platforms
• Air-gapped or highly regulated enterprise environments

• Strong experience with Infrastructure-as-Code (IaC) methodologies and automation utilizing Ansible.
• Experience designing and supporting private cloud infrastructure utilizing Apache CloudStack.
• Strong understanding of enterprise storage technologies, backup solutions, and distributed storage platforms
• Strong understanding of networking fundamentals including TCP/IP, VLANs, subnetting, DHCP, routing, and switching
• Experience administering Apache HTTP Server and Linux-based application hosting environments
• Experience implementing STIG hardening, SELinux, firewalld, patching, and enterprise security compliance practices
• Demonstrated ability to troubleshoot complex Linux infrastructure issues across compute, networking, storage, and virtualization domains

Qualifications We Prefer:

• Experience with Python and Bash

• Experience implementing enterprise observability and monitoring solutions utilizing: Grafana, Open Telemetry, Prometheus.

• Familiarity with: NISPOM and DFARS

• DoD RMF compliance frameworks.

• Experience supporting classified or highly regulated environments Familiarity with Git-based CI/CD pipelines and infrastructure automation workflows.

• Experience with container technologies such as Podman or Docker.

• Exposure to hybrid cloud or private cloud infrastructure engineering.

Some of our competitive benefits packages include:

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan that includes employer matching funds and separate. employer retirement contribution, including a Lifetime Income Strategy option.
• Tuition reimbursement program.
• Student Loan Repayment Program.
• Life insurance and disability coverage.
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection.
• Birth, adoption, parental leave benefits.
• Ovia Health, fertility, and family planning.
• Adoption Assistance.
• Autism Benefit.
• Employee Assistance Plan, including up to 10 free counseling sessions.
• Healthy You Incentives, wellness rewards program.
• Doctor on Demand, virtual doctor visits.
• Bright Horizons, child, and elder care services.
• Teladoc Medical Experts, second opinion program.
• And more!, The salary range for this role is 86,800 USD - 165,200 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 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.

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.

Do you want to be part of a new, exciting initiative to combine foundational IT with new digital technologies? Our Digital Technology team is driving business efficiencies and a better customer experience by connecting technologies, people, information and processes. From making aircraft more electric, intelligent and integrated to building new software platforms such as Internet of Things, big data, artificial intelligence, and blockchain, there's no better place to be right now than in digital. If you're an agile thinker who enjoys utilizing modern technology to make big improvements, then you're a perfect fit for this team. Join Collins Aerospace to help us revolutionize the aerospace industry today!, Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. Regardless of your role type, collaboration and innovation are critical to our business and all employees will have access to digital tools so they can work with colleagues around the world - and access to Collins sites when their work requires in-person meetings. At Collins, the paths we pave together lead to limitless possibility. And the bonds we form - with our customers and with each other -- propel us all higher, again and again. Apply now and be part of the team that's redefining aerospace, every day. 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.