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

Collins Aerospace; Largo (FL); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

3 weeks vacation and 401(k)

Relocation assistance

Job summary

RTX in Largo, FL is seeking a highly motivated Senior Level Mechanical Engineer to perform structural analysis, design updates, and documentation for military equipment. This onsite role collaborates with engineers to analyze, document, and report findings to customers to support certifications and MIL-STD-810 compliance.

The role requires U.S. citizenship and the ability to obtain a DoD security clearance, with experience in ANSYS and Creo.

Qualifications

• The ability to obtain and maintain a U.S. government issued security clearance is required; U.S. citizenship is required.
• Typically requires a STEM degree with 5+ years experience or an advanced degree with 3+ years experience.
• Experience with thermal issues using CFD software (ANSYS Icepak or comparable).
• Experience with modal analysis, internal stress loading, fatigue, margins of safety calculations, and FEA (ANSYS Mechanical).
• Prior knowledge of PLM/PDM software (PTC Windchill) and 3D CAD software (PTC Creo).

Responsibilities

• Communicate technical topics clearly to peers and non-technical members.
• Mentor and document knowledge to provide technical guidance to the team.
• Work with IPT to identify risks and opportunities.
• Coordinate with design teams to ensure robust designs meeting MIL-STD-810 environmental loads.
• Document analysis results for internal/external customers to support certifications.

Skills

Thermal CFD (ANSYS Icepak)

Modal analysis & fatigue

Finite element analysis (ANSYS)

3D CAD (PTC Creo)

Jira hardware development

Education

Degree in STEM (Science/Engineering/Math)

Advanced degree in related field

Tools

ANSYS Icepak

PTC Windchill

PTC Creo

Jira

Job description

Location: US-FL-LARGO-382SS ~ 7887 Bryan Dairy Rd. ~ BLDG 100

Date 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 1

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.

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 illnessinsurance, 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!

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.

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.

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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