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Principal Mechanical Engineer

Job in North Billerica, Middlesex County, Massachusetts, 01862, USA
Listing for: Thales Defense & Security
Full Time position
Listed on 2026-07-07
Job specializations:
  • Engineering
    Mechanical Engineer, Manufacturing Engineer, Engineering Design & Technologists, Product Engineer
Salary/Wage Range or Industry Benchmark: 134621 - 172105 USD Yearly USD 134621.00 172105.00 YEAR
Job Description & How to Apply Below
Location: North Billerica

Principal Mechanical Engineer

We currently have an opening in our Billerica, MA office for a Principal Mechanical Engineer. This position reports to the Visionix Senior Manager of System & Mechanical Engineering. The Principal Mechanical Engineer performs Mechanical CAD design of small, lightweight, helmet mounted display equipment and associated test equipment. The senior engineer will work as a member of a design team by providing quality CAD design using advanced principles of mechanical engineering, produce detailed part and assembly drawings using Solid Works, support prototype builds and verification testing, create and maintain bills of material, and provide supplier support during the procurement of materials.

Responsibilities:

  • Develop creative conceptual designs to meet system requirements and support the product strategy.
  • Lead mechanical design elements for making new products as well as improvements to existing products and execute all phases of the product design process.
  • Develop detailed design specifications and test plans.
  • Develop fixtures to support manufacturing requirements.
  • Implement design ideas into product designs using the latest materials, processes and manufacturing techniques in order to satisfy product requirements including cost and schedule requirements.
  • Fabricate rapid prototypes.
  • Conduct verification testing.
  • Support the transition of design to full production, including supplier and manufacturing start-up.
  • Support R&D efforts and continuous process improvements.
  • Complete assigned tasks in a quality and timely manner with minimal supervision.
  • Effectively support and communicate status, issues, needs and ideas to management.

Qualifications:

  • BSME or equivalent, MSME preferred.
  • 8+ years of mechanical design experience in product design.
  • Experience in the design and test of ruggedized small size, weight, and power electronic products to meet requirements including harsh MIL-STD-810 environments.
  • Expert (mechanical) technical, analytical and troubleshooting skills to identify and implement design solutions quickly.
  • Ability to lead design products for mid-to-high rate production manufacturing technologies and processes, including machining, casting, injection molding, sheet metal, elastomeric, flexible and rigid PCBs, SMT assembly, displays, batteries, and cabling and interconnects.
  • Experience designing and completing engineering changes within formal design processes (CMMI and ISO 9100) using configuration management software such as PTC Windchill or equivalent.
  • Experience designing to meet industry/DoD standards and practices (MIL-STD, ASTM, ANSI, FCC, UL, CE, RoHS, REACH, IPC, etc.).
  • Proficiency in the use of Mechanical CAD/CAE tools, such as PTC Creo or Solid Works.
  • Ability to think "out-of-the-box" and develop innovative design concepts.
  • Strong communication skills, both verbal and written.
  • Strong organization and time management skills to work independently and in teams within a fast pace dynamic work environment.
  • Ability to comply with all Company guidelines, policies, procedures and embrace Company Core Values.

The annualized pay range for this role is $134,621-$172,105 USD along with a target incentive compensation plan (ICP) of 5%. TDSI 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.

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