Senior Software Engineer (Onsite - Secret Clearance)

Date Posted:

2026-06-30

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

Are you looking to make a meaningful, positive impact while advancing your career? Would you be interested in working with an industry-leading development team where you can develop your software engineering skills while learning something new!

Collins Aerospace’s Resilient Connectivity Products (RCP) team is looking for a highly motivated and experienced Senior Software Engineer with a focus on Mission Engineering to join our team.

In this role, you will lead the development of software solutions to support mission-critical systems and architectures. You will leverage your expertise in software design, simulation, and integration to enable the delivery of high-value capabilities for aerospace and defense applications.

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:

• Design, develop, and implement mission-critical software systems, tools, and applications.
• Perform mission analysis and develop software solutions to model, simulate, and evaluate mission scenarios.
• Collaborate with multi-disciplinary teams to define software requirements and architecture for mission systems.
• Implement and optimize algorithms for mission planning, decision support, and system performance analysis.
• Develop and maintain software tools for modeling and simulation of mission environments (e.g., AFSIM, RCADE, C++, Python).
• Perform software integration and testing to ensure system functionality and reliability.
• Support software verification and validation efforts to meet mission objectives and requirements.
• Lead trade studies, technical reviews, and risk assessments for software-focused mission engineering tasks.
• Mentor junior engineers and provide technical leadership in software development and mission engineering.
• Ensure compliance with RTX software engineering processes, cybersecurity standards, and best practices.

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 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of prior work 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.

Qualifications We Prefer:

• Strong proficiency in programming languages such as Python, C++, or similar.
• Experience with software modeling and simulation tools (e.g., Simulink, STK, or similar).
• Familiarity with software development processes (e.g., Agile, DevSecOps, CI/CD) and tools (e.g., Git, Gitlab, JIRA).
• Advanced degree (Master’s or PhD) in Software Engineering, Computer Science, or a related discipline.
• Experience developing software for aerospace, defense, or mission-critical systems.
• Strong analytical and problem-solving skills with a focus on mission-driven software solutions.
• Excellent written and verbal communication skills.
• Expertise in artificial intelligence (AI), machine learning (ML), or optimization algorithms for mission applications.
• Experience working with model-based systems engineering (MBSE)Previous experience working with government or military customers.
• Demonstrated ability to lead technical teams and manage complex software projects.
• Experience integrating/deploying software to hardware solutions

What We Offer

Some of our competitive benefits package includes:

• 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!

Learn More & Apply Now!

Collins Aerospace, an RTX business, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving 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.

Apply now and be part of the team that’s redefining aerospace, every day.

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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