Senior Principal Software Engineer - Mission Sensors (Onsite)

RTX; Cedar Rapids (IA); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

401(k) with employer matching

Tuition reimbursement

Relocation assistance

Life insurance

Employee assistance program

Job summary

RTX is seeking a Senior Principal Software Engineer to support mission sensors and IFF avionics software. You will develop requirements, tests, verification and software integration in an Agile team, translating complex requirements into reliable software and test strategies.

You will mentor engineers, improve test processes, and contribute across multiple lifecycle phases. This U.S.-based role offers comprehensive benefits and relocation eligibility.

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) and 10+ years of experience, or an advanced degree with 7+ years.
• Experience working in Agile development teams.
• Experience developing software requirements.
• Experience with test automation using Python.
• Experience with engineering tools such as DOORS, PREP, TLBD, ALM, JIRA, Enterprise Architect, or similar.
• Hands-on systems and software integration experience on complex hardware/software systems.

Responsibilities

• Translate system requirements into robust software solutions and tests.
• Develop automated and semi-automated test scripts in Python.
• Update and maintain software products using Ada.
• Verify builds in integrated lab environments and support major program deliveries.
• Collaborate with cross-functional teams to refine requirements and designs.
• Present progress to Agile teams and leadership.
• Improve test development processes and ensure compliance with standards.
• Mentor junior engineers as a SME.

Skills

Agile development

Python

DOORS

PREP

TLBD

ALM

JIRA

Enterprise Architect

System integration

Testing and debugging

Education

STEM degree + 10+ years experience

Advanced degree in related field + 7+ years

Tools

DOORS

PREP

TLBD

ALM

JIRA

Enterprise Architect

Job description

Date Posted: 2026-11-12 Country: United States of America Location: US-IA-CEDAR RAPIDS-182 ~ 1100 Cimmie Ave Ne ~ BLDG 182 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract. Security Clearance Type: None/Not Required Security Clearance Status: Not Required

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. Help ensure mission-critical avionics software performs flawlessly in the real world. As a Senior Principal Software Engineer supporting mission sensors and IFF (Identification Friendly or Foe) avionics systems, you’ll play a key role in primarily developing requirements, tests, verification, along with software development and software integration that support aerospace and defense applications. You’ll work within a highly collaborative Agile team, helping develop and translate requirements into robust software solutions and test strategies while supporting system integration and verification efforts. If you enjoy solving complex technical challenges, improving engineering processes, and working across disciplines to deliver reliable systems, this role offers an opportunity to make a meaningful impact.

What You Will Do:

• You will support software engineering activities within an Agile development environment, helping develop and translate system and software requirements into effective software, test and verification strategies.
• You will develop automated and semi-automated test scripts using Python to validate software functionality and system performance.
• You will update and maintain our Software products using Ada.
• You will verify software builds in integrated lab environments and support formal verification events for major program deliveries.
• You will collaborate with cross-functional engineering teams to refine system requirements and design solutions that meet customer needs.
• You will present technical progress and status updates to Agile team members and engineering leadership.
• You will contribute to improving test development processes, tools, and best practices while maintaining compliance with company standards.
• You will help navigate through the bids & pursuits, adhering to Collins Processes.
• Mentor younger engineers through Software Engineering tasks as a SME.

What You Will Learn:

• You will gain experience integrating Line Replaceable Unit (LRU) software supporting mission sensor and weapons avionics systems.
• You will deepen your expertise across multiple phases of the aerospace systems lifecycle within a collaborative Agile environment.
• You will strengthen your software engineering skills by supporting complex software development, verification and integration efforts.
• If desired, you may have the ability to grow into Product Owner, Scrum Master, and/or Cost Account Manager type roles.

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience.
• Experience working within Agile development teams.
• Experience developing software requirements (heavy focus of this role).
• Experience with test automation using Python (heavy focus of this role).
• Experience with engineering tools such as DOORS, PREP, TLBD, ALM, JIRA, Enterprise Architect, or similar.
• Hands‑on experience in systems and software integration including experience with design, development, and testing of customer hardware and software systems & systems of systems of high complexity.
• Experience interacting with development teams to resolve discrepancies and issues.
• Experience with systems integration, test execution, and test results documentation.
• Experience problem solving and debugging.

Qualifications We Prefer:

• Experience (military or civil aircraft) in avionics systems.
• Avionics integration and lab test experience.
• Embedded software integration experience.
• Working knowledge / understanding of data busses and protocols (Ethernet, MIL-STD-1553B, and ARINC-429).
• Experience with Software development in Ada (heavy focus of this role).

What We Offer:

• 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
• Carrot Health to hormonal health, fertility, and family building
• 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!
• This role is eligible for relocation.

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