Senior Systems Engineer, Network Architecture & Infrastructure Protection (Onsite)

RTX; Richardson (TX); On-site; USD 96,000 - 182,000; Full time

Benefits offered by this job

Medical Insurance

Dental Insurance

Vision Insurance

Three weeks vacation

401(k) Matching

Job summary

RTX is seeking a Senior Systems Engineer in Richardson, TX to support Strategic Defense Solutions. You will develop system requirements, model architectures with SysML, and verify test procedures across system and sub-system levels in a security-cleared environment.

Collaborate with distributed teams, apply MBSE practices, and leverage VMware and cloud platforms. Onsite role requiring Top Secret clearance and U.S. citizenship.

Qualifications

• Understanding of network architectures, TCP/IP protocols, routing, switching, and VLANs.
• Familiarity with network segmentation, access control mechanisms, firewalls, and infrastructure protection techniques.
• Proven experience in systems engineering to include capturing customer requirements, operations concept development, deriving and tracing system and sub-system requirements.
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) unless prohibited by local laws/regulations and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience.
• Active and transferable U.S. government DoD issued Top-Secret security clearance prior to start date.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Responsibilities

• Develop, analyze and maintain system level requirements related to network infrastructure connectivity and system protection.
• Evaluate network and system architectures against established technical standards to identify vulnerabilities, dependencies, and potential operational risks.
• Support network hardening and system integrity through the implementation of access controls, traffic filtering and secure communication mechanisms.
• Analyze network configuration, protocols, system access mechanisms to identify weaknesses and recommend improvements.
• Building complicated models using SysML for activity, state, block diagrams, and use cases.
• Develop and verify test procedures at the system and sub-system levels.
• Utilize VMWare or other cloud platforms (AWS, GCP, Azure, Oracle) in cloud and hybrid environments.
• Utilize JIRA to decompose features into user stories with clear acceptance criteria.
• Support communication between functional discipline groups within the organization.
• Engage in classified lab environments to apply your expertise hands‑on.
• Utilize effective communication skills with all levels of management, program team members, and external stakeholders.

Skills

Networking concepts

TCP/IP protocols

Systems engineering

Security fundamentals

VLANs and routing

Education

STEM degree

Advanced degree

Tools

MagicDraw Cameo

Rhapsody

Enterprise Architect

VMware

JIRA

Job description

Date Posted:
2026-11-03
Country:
United States of America
Location:
US-TX-RICHARDSON-C17 ~ 1717 Cityline Dr ~ CITYLINE C17
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:
Top 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. Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Are you ready to make a meaningful impact while advancing your systems engineering career?

At Collins Aerospace, you’ll help shape the future of aerospace technology by supporting mission-critical systems that strengthen national defense and protect those who serve.

As a Senior Systems Engineer within Strategic Defense Solutions (SDS), you will apply your technical expertise to the development of advanced Strategic Nuclear Deterrence capabilities, contributing to the design, integration, and validation of secure, resilient mission systems. In this role, you will collaborate across geographically distributed teams to support systems and cybersecurity engineering efforts for next-generation network, compute, and storage technologies—from early-stage development through accreditation and production.

This position offers the opportunity to expand your leadership and technical capabilities while working alongside experienced professionals in communications and nuclear deterrence. We are seeking motivated engineers who thrive in solving complex problems, driving technical execution, and collaborating across disciplines to deliver innovative solutions for critical missions.

This position is located onsite in Richardson, TX and requires an active Top Secret clearance.

What YOU Will Do:

• Develop, analyze and maintain system level requirements related to network infrastructure connectivity and system protection.
• Evaluate network and system architectures against established technical standards to identify vulnerabilities, dependencies, and potential operational risks.
• Support network hardening and system integrity through the implementation of access controls, traffic filtering and secure communication mechanisms.
• Analyze network configuration, protocols, system access mechanisms to identify weaknesses and recommend improvements.
• Building complicated models using SysML for activity, state, block diagrams, and use cases.
• Develop and verify test procedures at the system and sub-system levels.
• Utilize VMWare or other cloud platforms (AWS, GCP, Azure, Oracle) in cloud and hybrid environments.
• Utilize JIRA to decompose features into user stories with clear acceptance criteria.
• Support communication between functional discipline groups within the organization.
• Engage in classified lab environments to apply your expertise hands‑on.
• Utilize effective communication skills with all levels of management, program team members, and external stakeholders.

What YOU Will Learn:

• Advanced aerospace and defense solutions supporting mission‑critical military platforms.
• Application of Model‑Based Systems Engineering (MBSE) principles to emerging technologies and complex system architectures.
• Hands‑on experience with next‑generation network, compute, storage, and cloud‑based technologies.
• Leadership and operational excellence through Collins Aerospace’s Customer Oriented Results and Excellence (CORE) Operating System.

Qualifications YOU Must Have:

• Understanding of network architectures, TCP/IP protocols, routing, switching, and VLANs.
• Familiarity with network segmentation, access control mechanisms, firewalls, and infrastructure protection techniques.
• Proven experience in systems engineering to include capturing customer requirements, operations concept development, deriving and tracing system and sub‑system requirements.
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) unless prohibited by local laws/regulations and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience.
• Active and transferable U.S. government DoD issued Top‑Secret security clearance prior to start date.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer:

• Experience with Model‑Based Systems Engineering (MBSE), including development of SysML models such as activity, state, block diagrams, and use cases using tools like MagicDraw Cameo, Rhapsody, or Enterprise Architect.
• Experience with Linux Operating System.
• Familiarity with National Institute of Standards and Technology (NIST) standards, Risk Management Framework (RMF) processes, and Defense Information Systems Agency Security Technical Implementation Guides (DISA STIGs).
• Agile experience working as a scrum master, Product Owner (PO), Release Train Engineer (RTE), or other agile leadership roles.
• Experience with processes such as peer review, configuration, and change management.
• Participating in root cause analysis and corrective actions.
• Identify, assess, and manage technical risks and opportunities to support program execution, system performance, and successful delivery of mission objectives.

What we offer:

• 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 coverage: you can purchase pet insurance, home and auto insurance, additional life and accident insurance,critical illnessinsurance, 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
  • Relocation assistance may be provided
  • And more!

* Please consider the following role type definitions as you apply for this role.

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.

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.

#MISENG

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 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 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.