Sr. Principal Systems Engineer - STARS Architecture Modernization (Onsite)

Prattwhitney; Marlborough (MA); On-site; USD 132,000 - 252,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Generous 401(k) plan with matching and

Tuition reimbursement

Student Loan Repayment Program

Life insurance and disability coverage

Parental leave benefits

Wellness incentives

Flexible benefits options

Job summary

RTX seeks an experienced MBSE Architect to lead the architecture development for the STARS system, creating conceptual, logical, and physical architectures and defining interfaces. You will build high-quality MBSE models with Cameo and guide modernization through trade studies and roadmaps.

You will collaborate across systems, software, hardware, and program management to ensure alignment, governance, and traceability, mentoring others in MBSE and ensuring regulatory compliance across NAS

Qualifications

• 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 10+ years of experience in complex system architecture, systems engineering, or equivalent roles.
• Proven experience developing architectures for safety-critical, mission-critical, or large-scale distributed systems.
• Expert-level proficiency with Cameo Systems Modeler, SysML, and MBSE processes.
• Strong knowledge of system requirements, interface design, integration, and verification strategies.
• Demonstrated ability to lead architectural efforts from concept through implementation.

Responsibilities

• Lead the architecture development effort for the next-generation STARS system, including conceptual architecture, logical and physical architectures, and interface definitions.
• Develop and maintain high-quality MBSE models using Cameo to represent system behavior, structure, interfaces, constraints, and verification pathways.
• Perform architecture trade studies and define technical roadmaps to guide modernization efforts.
• Collaborate with systems engineering, software engineering, hardware engineering, integration/test, and program management to ensure architectural alignment and feasibility.
• Establish and enforce architectural and modeling standards, patterns, and best practices.
• Support requirements decomposition and allocation using MBSE techniques to ensure traceability and consistency across system artifacts.
• Present architectural concepts, analyses, and decision rationales to internal and external stakeholders, including leadership and customers.
• Mentor junior engineers in MBSE methodologies, Cameo usage, and system architecture principles.
• Ensure all architectural work complies with safety, regulatory, and certification requirements relevant to NAS systems.

Skills

MBSE

SysML

Cameo Systems Modeler

Architecture leadership

Requirements traceability

Interface design

Proven communication

Education

STEM degree

10+ years architecture experience

Tools

Cameo

Job description

Date Posted: 2026-09-03 Country: United States of America Location: US-MA-MARLBOROUGH-MA3 ~ 1001 Boston Post Rd ~ BLDG 3

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

What You Will Do

• Lead the architecture development effort for the next-generation STARS system, including conceptual architecture, logical and physical architectures, and interface definitions.
• Develop and maintain high-quality MBSE models using Cameo to represent system behavior, structure, interfaces, constraints, and verification pathways.
• Perform architecture trade studies and define technical roadmaps to guide modernization efforts.
• Collaborate with systems engineering, software engineering, hardware engineering, integration/test, and program management to ensure architectural alignment and feasibility.
• Establish and enforce architectural and modeling standards, patterns, and best practices.
• Support requirements decomposition and allocation using MBSE techniques to ensure traceability and consistency across system artifacts.
• Present architectural concepts, analyses, and decision rationales to internal and external stakeholders, including leadership and customers.
• Mentor junior engineers in MBSE methodologies, Cameo usage, and system architecture principles.
• Ensure all architectural work complies with safety, regulatory, and certification requirements relevant to NAS systems.

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 10+ years of experience in complex system architecture, systems engineering, or equivalent roles.
• Proven experience developing architectures for safety-critical, mission-critical, or large-scale distributed systems.
• Expert-level proficiency with Cameo Systems Modeler, SysML, and MBSE processes.
• Strong knowledge of system requirements, interface design, integration, and verification strategies.
• Demonstrated ability to lead architectural efforts from concept through implementation.
• Excellent communication, presentation, and technical leadership skills.

Qualifications We Prefer

• Experience with FAA systems, ATC/ATM domain, or other highly regulated environments.
• Familiarity with STARS or related NAS infrastructure.
• Experience with digital engineering pipelines, model governance, or toolchain integration.
• Knowledge of enterprise architecture frameworks (DoDAF, UAF).

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, 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
• And more!

Salary range: 132,400 USD - 251,600 USD. The salary range provided is a good faith estimate representative of all experience levels.

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.

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

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 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.