Principal Mechanical Engineer

Principal Mechanical Engineer

Job Locations


11 hours ago(10/22/2026 7:48 AM)

Job ID


2026-12384

Posted Date


Engineering

Job Location

US-MA-Franklin

Company Overview

We 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 Overview

QinetiQ US is seeking a highly motivated Principal Mechanical Engineer, who will be responsible for the design, development, analysis, and design maintenance of military and commercial hardware products. Products include ruggedized military electronic equipment for maritime applications, robotic ground vehicles, vehicle autonomy hardware and ground robots. Acting as a technical lead supporting existing and new products, 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 facility.

Responsibilities

Electromechanical 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.
• Implement 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 drawings
• Provide 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 Qualifications

• 10-20 years' experience in mechanical design.
• Direct project engineering or technical lead experience managing design tasks
• Experience performing Finite Element Analysis
• Design of maritime systems and hardware
• Design of robotic systems and hardware
• Capable of following mechanical programs from inception through system integration
• Capable of leading design teams of up to 6 engineers/designers
• Knowledge of sheet metal fabrication, machining processes
• Knowledge of stage-gate and design cycle processes
• Experience with welding standards and practices.
• Experience in processing Engineering Changes to documentation on DoD programs.
• Mechanical Engineering BS (or equivalent), MS preferred.

Preferred Qualifications

• 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 Transparency

The salary range for this role is $134,000- $175,000 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 Statement

Accessibility/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.