Senior Platform Software Engineer – Linux (Onsite)

globalhr; McKinney (TX); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Relocation Offered Based OnEligibility

Job summary

RTX is seeking an experienced infrastructure engineer for the AES product family in McKinney, TX. The role focuses on designing, implementing, and supporting mission-critical systems with DoD security controls and collaboration across software, cybersecurity, and systems teams.

You will work onsite in McKinney, TX, with required DoD Secret clearance and U.S. citizenship. The position emphasizes virtualization, scripting, IaC, and secure, scalable deployments.

Qualifications

• Degree in STEM with 5+ years of relevant engineering experience.
• DoD Secret clearance is required to start.
• U.S. citizenship is required for security clearance eligibility.
• Experience with Linux, scripting, and IaC/tooling is expected.

Responsibilities

• Troubleshoot, maintain, and optimize infrastructure operations for AES Product Family.
• Analyze requirements for computer, server, network, and telecom systems.
• Design, code, test, and support systems integration for surveillance and targeting systems.
• Collaborate with cybersecurity teams to meet security controls.
• Coordinate with software and systems engineers for performance and deployments.
• This job is onsite in McKinney, TX; residency or relocation required.
• Obtain and maintain a U.S. government-issued Secret clearance.

Skills

Linux system administration

Bash scripting

Python scripting

Networking concepts

Education

Bachelor's degree in STEM

Tools

Git

Jira

CI/CD (Jenkins/GitLab)

Ansible

Terraform

Docker

Kubernetes

Red Hat Enterprise Linux

Job description

Date Posted:

2026-09-16

Country:

United States of America

Location:

US-TX-MCKINNEY-513WC ~ 2501 W University Dr ~ WING C BLDG

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required after 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.

The Advanced Product and Solutions organization at RTX provides the joint warfighter with actionable information from an unblinking eye across the battlespace. By joining the APS Engineering team you’ll have the opportunity to design, develop and test product capabilities for Active Electronically Scanned Array (AESA) radars, integrated sensor suites, precision targeting, multispectral EO/IR targeting systems, Pilot Situational Awareness, Special mission aircraft and Strategic and tactical ISR Systems.

But more than anything, we are innovators, creators and strategists drawing inspiration from each other every day. We collaborate, iterate, and execute with an eye toward the company mission and personal career growth.

What You Will Do

• Troubleshoot, maintain, and implement solutions to optimize infrastructure operations for the AES Product Family.

• Analyze and identify requirements for new or existing computer, server, peripheral, network, and telecommunications systems, considering specialized technology needs.

• Design, implement, code, test, document, and support systems integration for mission‑critical advanced surveillance and targeting system solutions.

• Collabore closely with cybersecurity teams to ensure all security controls are met.

• Work alongside software engineers, systems engineers, and implementation teams to ensure performance and deployment compliance.

• This job is onsite in McKinney, TX; local residency or relocation required.

• The ability to obtain and maintain a U.S. government issued Secret security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications You Must Have

• Typically requires a degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of prior relevant engineering experience. An advanced degree in a related field may be substituted for an additional 2 years of experience.

• CompTIA Security+ certification required

• Experience with Red Hat Enterprise Linux (7.x/8.x) including:

  • Software and hardware installation and maintenance

  • System administration tasks such as patching, RPM packaging, performance tuning, networking, LDAP user management, and security

  • Securing and hardening RHEL systems per STIG requirements

  • Scripting with Bash and Python

  • Linux virtualization (KVM), Linux networking (creating virtual NICs, implementing forwarding rules, bridging interfaces), and general networking capabilities

• Experience with developer tools including Git, Artifactory, Bitbucket, Jira, and CI/CD tools (Jenkins or GitLab).

• Experience implementing Infrastructure as Code (IaC) and containerized environments using Ansible, Kickstart, Terraform, Chef, Docker, Podman, and Kubernetes to standardize and automate platform provisioning and deployments.

Qualifications We Prefer

• Active and transferable U.S. government issued Secret security clearance.

• Excellent hardware and software troubleshooting skills

• Linux Security, Hardening, and Enterprise Management

  • Red Hat Certified System Administrator (RHCSA)

  • Red Hat Satellite administration

  • LUKS implementation

  • VM and container hardening and vulnerability analysis

  • Performance tuning and monitoring

  • RMF (Risk Management Framework) knowledge

• Networking

  • Configure Layer 2 Cisco switches with simple VLANs, setting static routes

  • Configure switches as PTP boundary clocks

  • PTP sync issues, ptp4l

  • Configure grandmaster clocks (e.g., Safran/Orolia SecureSync)

• Enterprise Infrastructure and Identity Services

  • NAS and SAN administration

  • DNS, sendmail, LDAP administration

  • AD, SAML, OAuth, OpenID, and other strong authentication technologies

• Cloud and DevSecOps Ecosystems

  • Familiarity with AWS and Azure

  • Experience with Platform One DevSecOps platform toolchains and capabilities

• Experience with at least one major programming language (Groovy, C++, C#, Python, Java) and troubleshooting on a Linux system

• Excellent interpersonal and communication skills

• Demonstrated experience learning new technologies, methodologies and processes quickly

• Proven ability to work effectively with remote colleagues and customers

• Experience administering Windows based systems

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.

• Relocation Offered Based On Eligibility

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect 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 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.

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