Sr. Principal Mechanical Engineer

Company OverviewWe are a world-class team of professionals who deliver next generation technology and products in robotic and autonomous platforms, ground, soldier, and maritime systems in 50+ locations world-wide. Much of our work contributes to innovative research in the fields of sensor science, signal processing, data fusion, artificial intelligence (AI), machine learning (ML), and augmented reality (AR).QinetiQ US’s dedicated experts in defense, aerospace, security, and related fields all work together to explore new ways of protecting the American Warfighter, Security Forces, and Allies. Being a part of QinetiQ US means being central to the safety and security of the world around us. Partnering with our customers, we help save lives; reduce risks to society; and maintain the global infrastructure on which we all depend.Why Join QinetiQ US?If you have the courage to take on a wide variety of complex challenges, then you will experience a unique working environment where innovative teams blend different perspectives, disciplines, and technologies to discover new ways of solving complex problems. In our diverse and inclusive environment, you can be authentic, feel valued, be respected, and realize your full potential. QinetiQ US will support you with workplace flexibility, a commitment to the health and well-being of you and your family and provide opportunities to work with a purpose. We are committed to supporting your success in both your professional and personal lives.Position OverviewQinetiQ US is seeking a highly motivated Senior Principal Mechanical Engineer, who will be responsible for the design, development, analysis, and design maintenance of military and commercial hardware products. Products include robotic ground robots, vehicle autonomy hardware and ground vehicles, ruggedized military electronic equipment for ground vehicle applications. Acting as a technical lead supporting existing and new products and proposals, the candidate will evaluate design changes, perform design and analysis tasks, plan and oversee design tasks, review and approve design documentation at our Franklin, MA facilityResponsibilitiesElectromechanical design, layout, modeling and production support of electro-mechanical assemblies and electronics packaging (using Solidworks and/or CREO).Analysis of complex mechanical systems via ANSYS Workbench implementing both explicit and implicit modeling to study vibration, shock, fluids, Fluent, structural loading, and thermal responses / performance of the system.Develop Engineering Estimates and design concepts for proposalsImplement Design for Manufacturability (DFM) practices.Create/update detailed designs and drawings for fabrication.Interface with customers and vendors on a project engineering level.Writing design specifications, reports, and proposals.Presenting technical internal and customer presentations.Perform tolerance analysis, check and approve detail designs and drawingsProvide technical guidance to vendors and manufacturing in the build of DoD electromechanical assemblies.Disposition discrepant material, author fabrication deviations for suppliers, support assembly personnel in support of manufacturing military electronic equipment.Must support both Devens and Franklin facilities.Must be able to obtain and maintain a DoD Security Clearance if required.Required Qualifications15-30 years’ experience in mechanical design.Direct project engineering or technical lead experience managing design tasksExperience performing Finite Element AnalysisDesign of land system platforms, maritime systems and hardwareDesign of robotic systems and hardwareCapable of following mechanical programs from inception through system integrationCapable of leading design teams of up to 6 engineers/designersKnowledge of sheet metal fabrication, machining processesKnowledge of stage-gate and design cycle processesExperience with welding standards and practices.Experience in processing Engineering Changes to documentation on DoD programs.BS degree in Mechanical Engineering (or equivalent).Preferred QualificationsMS degree in Mechanical Engineering (or equivalent).Experience with Ansys Fluent and CFX is desired. Ability to develop analytical models for both forced and free convection systems in Excel or MathCAD.A strong understanding of structural systems, DOD shock/vibration and system dynamics is desired.Pay TransparencyThe salary range for this role is $140,000- $190,000 USD. The salary range provided is a good faith estimate representative of all experience levels. QinetiQ US 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.Company EEO StatementAccessibility/Accommodation:If because of a medical condition or disability you need a reasonable accommodation for any part of the employment process, please send an e-mail to View email address on click.appcast.io or call View phone number on click.appcast.io Opt. 1 and let us know the nature of your request and contact information.QinetiQ US is an Equal Opportunity Employer. All Qualified Applicants will receive equal consideration for employment without regard to race, age, color, religion, creed, sex, sexual orientation, gender identity, national origin, disability, or protected Veteran status.Job SummaryJob ID: 2026-12385Posted Date: EngineeringJob Location: US-MA-Franklin