Senior Thermal Engineer

Senior Thermal Engineer – Onsite Date Posted: 2026-05-04 Location: 2000 E El Segundo Blvd, BLDG E01, El Segundo, CA, United States of America (Onsite) Security Clearance: U.S. citizenship required; ability to obtain and maintain a U.S. government issued security clearance. Security Clearance Status: Not required. Overview The Mechanical Analysis and Test (MA&T) Department ensures structural and thermal design robustness across Raytheon products. We seek a mid-level Senior Thermal Engineer to join the MA&T Center in El Segundo, CA. Job Responsibilities Perform hand calculations to determine scoping for higher detail analysis models. Conduct detailed thermal analyses to solve various program thermal challenges, ranging from classical hand analyses to finite element methods. Generate test plans to validate analyses and verify hardware compliance. Analyze test data to validate and correlate models. Collaborate with experienced analysts on moderate‑complexity problems within program cost and schedule constraints. Review own work with peers to ensure technical accuracy. Present results to internal, external, and government customers. Document work in detail and archive for reference. Act as a technical leader, helping define or refine MA&T technical processes and tools, and/or lead analysis/test teams. Qualifications You Must Have Degree in Science, Technology, Engineering or Mathematics (STEM) with a minimum of 5 years of prior relevant experience, or an advanced degree with a minimum of 3 years of experience. Experience in thermal analysis using tools such as FloTHERM, PATRAN, Thermal Desktop/SINDA, ANSYS or equivalent. Strong mechanical principles to solve classical thermal analysis without and with finite element tools, and an ability to work independently and manage multiple priorities. Demonstrated experience in thermal testing: planning, organization, execution, data reduction and correlation. Ability to obtain a U.S. government issued security clearance; U.S. citizenship required. Qualifications We Prefer Degree in Mechanical or Aerospace Engineering. 8+ years of professional experience in thermal analysis of complex systems requiring collaboration across multiple engineering disciplines. Experience with solid modeling CAD tools such as CREO or equivalent. Experience with thermal analysis of electro‑optical sensor systems. Experience with planning and performing Thermal Vacuum (TVAC) testing. Experience with orbital thermal analysis using Thermal Desktop or equivalent. Demonstrated experience leading a team of thermal analysts on program efforts. Experience leading thermal testing, including model correlation. Experience presenting to external customers. Ability to travel to government and other facilities to support program activities. Advanced degree in a related discipline; ABET accreditation preferred but not required. Salary and Benefits Salary Range: $95,500 – $181,700 USD. Benefits include medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, employee scholar program, parental leave, paid time off, holidays, and incentives based on level and collective‑bargaining status. What We Offer Robust total rewards package with competitive compensation, healthcare, wellness, retirement and work/life benefits, career development and recognition programs. Parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance, child/adult backup care. Onsite role: employees work primarily onsite for production and maintenance tasks. Relocation eligibility – relocation assistance available. 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 our office locations. 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, veteran status, or any other 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. #J-18808-Ljbffr