Principal Mechanical Engineer – Gearbox Design (Onsite)

Job description

Date Posted: 2026-08-26 Country: United States of America Location: US-TX-RICHARDSON-461 ~ 3200 E Renner Rd ~ RENNER BLDG 461 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 in Richardson, TX is seeking a highly motivated Principal Mechanical Engineer that is passionate about the design, development, and integration of dynamic electro-mechanical systems. In this role you will serve as a technical leader and subject-matter expert responsible for architecting, developing, and validating gearbox systems for complex mechanical and aerospace applications. The selected candidate will also work closely with other disciplines, such as Electrical, Systems, and Test Engineering to ensure all mechanical systems and components meet requirements during all phases of our products’ lifecycle. Sign-on Bonus Eligible What You Will Do: • Lead the conceptual and detailed design of gearbox systems, including gear trains, bearings, housings, lubrication systems, and supporting structure. • Communicate technical topics and issues in a clear and concise manner to both technical peers as well as non-technical team members. • Contributes to the design and/or selection of mechanical and electro-mechanical hardware such as motors, hydraulic pumps, bearings, and large rotating equipment. • Perform analysis on selected components to ensure functional requirements of equipment are met. • Conduct prototype build, integration, and testing activities to validate component and system level compliance with customer requirements. • Conduct and provide constructive feedback during peer reviews. • Mentor and document knowledge to provide technical domain guidance to both members of own team and beyond. • Work proactively and in a self-driven manner with an integrated product team (IPT) to manage project scope and budget, as well as identify risks and opportunities. Qualifications You Must Have: • Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience. • 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. • Previous experience in applying gear theory including spur helical, bevel, hypoid and planetary gearsets, gear geometry, contact ratio, tooth-root stress, pitting resistance, etc. • Proven experience in designing shafts, bearings and gearbox lubrication systems. Qualifications We Prefer: • Active possession of a U.S. government issued Secret or Top Secret clearance. • Application of commercial and defense standards, such as RTCA DO‑160 and MIL‑STD‑810. • Ability to apply industry best practices using 3D CAD tools, preferably SolidWorks or Siemens NX. • Previous experience conducting thermal and structural Finite Element Analysis (FEA) using Ansys Mechanical, CFD++, or Fluent. • Capable of interpreting and implementing ASME Y14.5 Geometric Dimensioning and Tolerancing guidelines. • Previous experience with fatigue, modal, random vibration, transient shock, and acoustic analyses. • Knowledgeable in key military standards, including MIL‑STD‑1472 and MIL‑STD‑461. 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 • Maybe eligible for relocation • And more! Learn More & Apply Now Do 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 cust