Senior Mechanical Engineer - Structural/Thermal Analysis and Design (Onsite)

Job ID: 01867097Posted: Posted TodayStart Date: 2026-08-18Location: US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100Country: United States of AmericaTime Type: Full timeDate Posted:2026-08-18 Country:United States of America Location:US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100 Position Role Type:Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements:The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1At 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.The Strategic Defense Solution (SDS) team is seeking a highly motivated Senior Level Mechanical Engineer that enjoys contributing to the analysis, design updates, and documentation of military equipment. This individual will provide structural analysis to the design groups as well as design inputs, changes, and considerations as required. This position will require working with other mechanical engineers to properly analyze, document, and report analysis findings to customers in the form of deliverable items that support downstream military applications and certifications.This is an onsite position located in Largo, FL.Sign-on Bonus Eligible What You Will Do: Communicate technical topics and issues in a clear and concise manner to both technical peers as well as non-technical team members.Conduct and provide constructive feedback during peer reviews. Mentor and document knowledge to provide technical guidance to both members of own team and beyond.Work proactively with an integrated product team (IPT) to identify risks and opportunities.Coordinate with and contribute to design teams on designs to ensure robust design choices and compliance with program requirements for environmental needs, such as shock, vibration, and crash loading per MIL-STD-810 loads.Document results from analyses both for internal and external customers such that data can be easily referenced in the future or support customer certification on military platforms.Participate in and lead investigations into highly complex, open-ended tasks. Search for and identify root cause of issues.Create military compliant designs that incorporate custom machined/sheet metal parts with a selection of commercial off the shelf items as required.Work with designers and drafters to create, modify, and release documentation such as part and assembly drawings.Contribute to testing activities to verify product requirements compliance and correlation to relevant analyses.Qualifications You Must Have:The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience.Experience with thermal issues using computational fluid dynamics software (ANSYS Icepak or comparable).Previous experience with modal analysis, internal stress loading, fatigue, and margins of safety calculations and documentation, as well as with finite element analysis software for structural considerations (ANSYS Mechanical or comparable).Prior knowledge of PLM/PDM software, PTC Windchill, and 3D CAD software (preferably PTC Creo).Qualifications We Prefer:Active DoD security clearance or Top Secret Clearance.Practical skills in designing electronics packaging designs (enclosures and/or racks) with strict size, weight, and power (SWaP) criteria, as well as environmental (static and dynamic) mitigation.Previous experience with designing printed circuit boards (PCBs) and supporting non-mechanical duties like component layout and selection to guarantee mechanical environmental considerations are fulfilled.According to ASME Y14.5 standards, interpret Geometric Dimensioning and Tolerancing (GD&T).Previous experience with military standards such as MIL-STD-810 and MIL-STD-1472.Extensive knowledge of Jira-driven hardware development techniques and abilities designing and qualifying devices for extreme environments.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 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 Ovia 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 May be eligible for relocation  And more!  Learn More & Apply NowDo you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. Please ensure the role type (defined below) is appropriate for your needs before applying to 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. #MISENGAs 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.The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.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 with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Privacy Policy and Terms:Click on this link to read the Policy and Terms