Principal Software Engineer (Onsite - Secret Clearance)

Prattwhitney; Aguadilla (PR); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks vacation

Generous 401(k) with employer matching

Job summary

Collins Aerospace, an RTX business, seeks a Principal Software Engineer in Aguadilla, PR, onsite five days a week. You will drive embedded software excellence, translate customer requirements into end-to-end systems, and lead small teams while overseeing cost, schedule, and risk. Must have U.S.

citizenship and active DoD clearance; relocation not offered. You will collaborate with high-performance teams on mission-critical solutions for aerospace and defense programs, mentoring peers and shaping

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) and 8 years of experience, or an Advanced Degree with 5+ years.
• Professional experience in English (spoken and written).
• U.S. citizenship and active DoD security clearance required.

Responsibilities

• Drive Embedded Software Engineering Excellence across all development phases.
• Lead proposals and program cost estimations for bids.
• Lead software execution for small teams to ensure quality and schedule alignment.
• Translate customer requirements into end-to-end solutions addressing tech, schedule and cost constraints.
• Estimate and track program cost, schedule, and risk using earned value management.
• Identify and mitigate risks early in development processes.
• Mentor other engineers to grow execution and management capabilities.

Skills

Embedded C/C++

Python

Cost accounting

Integrated Master Schedule

Risk management

Agile

Scrum Master

Product Owner

TCP/IP

UML

Education

STEM degree

Advanced degree

Job description

Date Posted: 2026-08-13 Country: United States of America Location: US-PR-AGUADILLA-110 ~ Rd 110 N Km 28.8 ~ RD110 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: DoD Clearance: Secret

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.

Collins Aerospace’s Resilient Connectivity Products (RCP) team is looking for an exceptionally motivated engineer who is passionate about collaborating with high-performance teams to create mission-critical solutions that support Mission Systems. Our Principal Software Engineers work in an exciting, adaptive, and engaging environment, enabling rapid learning to drive success. Our software engineering teams regularly utilize a variety of skills, including requirements analysis, synthesis of new and existing architectures that meld commercial and military communication functionality, and software engineering development best practices for complex systems where the ability to execute the mission is paramount.

This position will sit at our Aguadilla, PR location and is to be worked Onsite, 5 days a week. You must be residing in Puerto Rico at the time of starting employment. Relocation is not offered.

What YOU will do:

• Drive Embedded Software Engineering Excellence: Demonstrate expert proficiency in embedded C/C++ and Python throughout all phases of software development, ensuring high-quality, reliable solutions that meet both functional and performance requirements
• Lead Technical Proposals and Program Cost Estimations: Take ownership of leading the development of technical proposals, including detailed program-level cost estimates, during the bid and proposal cycle, ensuring competitive and accurate submissions that align with project goals
• Lead and Coordinate Software Execution for Small Teams: Lead and manage the execution of software development for smaller teams, ensuring technical quality, alignment with program cost and schedule, while fostering a collaborative and results-driven environment
• Translate Customer Requirements into Comprehensive Solutions: Leverage your expertise to translate customer requirements into end-to-end system solutions, addressing technical, schedule, and cost constraints while ensuring the solution is practical, scalable, and meets client needs
• Manage Program Cost, Schedule, and Risk: Estimate, track, and communicate program performance metrics, including cost, schedule, and risk, in alignment with earned value management, ensuring programs are delivered on time and within budget
• Proactively Identify and Mitigate Risks: Use your technical expertise and best practices to identify potential risks and issues early in the development process, taking proactive measures to mitigate problems and maintain program success
• Mentor other engineers to grow team proficiency in execution and management

What YOU will learn:

You will learn about our growing engineering team in Puerto Rico; What we do? Who we support? How we work? You will learn the technologies of today and tomorrow which we count on to maintain world leadership in the aerospace industry. You will learn why people enjoy and feel fulfilled by working in our industry.

Qualifications you must have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience.
• Demonstrated professional experience communicating in English (verbal and written).
• U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract.
• Active and transferable U.S. government issued security clearance is required prior to start date.
• Previous experience with Cost Account Management, Integrated Master Schedule, ROAM process, Risk/Opportunity frameworks, and Product owner Skillsets.

Qualifications We Prefer:

• Experience with multi-threaded real-time embedded applications
• Prior experience leading proposals and bidding exercises
• Experience with Agile development methodology
• Ability to take on the role of Scrum Master or Product Owner
• TCP/IP network applications development experience
• UML experience
• Background and/or knowledge of cross domain solutions

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
• Participation in the Employee Scholar Program (ESP)
• Life insurance and disability coverage
• Employee Assistance Plan, including up to 8 free counseling sessions.
• And more!

Collins Aerospace, an RTX business, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join our growing engineering team in Puerto Rico, where you will provide critical support to all Collins SBUs, working on exciting programs and projects ranging from the development of the next generation of advanced concept ejection seats to the latest technologies for the U.S. warfighter.

WE ARE REDEFINING AEROSPACE.

Please consider the following role type definition 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.

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.

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry‑leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.