Mechanical Design Engineer

About the Role

Langham Recruitment is seeking a Mechanical Design Engineer for an on-site, full-time position in Billerica, Massachusetts. This role supports an innovative advanced materials company developing next-generation thermal management solutions for the semiconductor and electronics industries. The position offers an excellent opportunity for an early-career mechanical engineer to work on practical engineering challenges, develop CAD and testing capabilities, and gain exposure to advanced semiconductor packaging programs.

Key Responsibilities

• Mechanical Design: Create CAD models, assembly drawings, and fabrication documentation for integrating liquid-metal-based thermal interface materials into customer-specific electronic packages.
• Prototyping & Testing: Build and instrument package mock-ups and assembly fixtures. Assess design feasibility through mechanical, thermal, and reliability testing.
• Thermal Analysis: Set up and conduct thermal and mechanical tests. Analyze resulting data and prepare clear technical reports.
• Fabrication & Supplier Coordination: Coordinate component fabrication with internal workshop resources and external vendors to maintain project timelines.
• Customer Qualification Support: Assist senior engineers with sample builds, test data packages, and technical materials for application notes and design guides.
• Requirements Capture: Document customer specifications and constraints, including geometry, mechanical loads, assembly requirements, operating environments, thermal budgets, and reliability standards.
• R&D & Continuous Improvement: Collaborate with the wider R&D team to improve product performance, refine designs, and support ongoing development.
• Technical Documentation: Maintain accurate CAD files, design records, test results, and documentation throughout the customer qualification process.

Requirements & Tech Stack

• Proficiency in 3D CAD modelling and engineering drawings, using SolidWorks, Creo, or similar software.
• A working understanding of Geometric Dimensioning and Tolerancing (GD&T).
• Practical experience with prototyping, laboratory equipment, fixture assembly, testing, and troubleshooting.
• A sound understanding of heat transfer and mechanical engineering fundamentals, with an interest in thermal design and electronics packaging.
• Strong analytical skills and the ability to interpret experimental data.
• Ability to communicate findings through technical documentation.
• Good communication skills.
• A proactive approach to learning.
• Ability to work collaboratively in a fast-moving engineering environment.

Qualifications

• A Bachelor's or Master's degree in Mechanical Engineering or a closely related discipline.
• 0–3 years of relevant professional experience. Applications from candidates with suitable internships, co-ops, or hands-on engineering projects are encouraged.

Desirable Experience

• Semiconductor packaging, electronics assembly, or thermal interface materials.
• Reliability testing, including temperature cycling (TCT), high-temperature storage (HTS), or highly accelerated temperature and humidity stress testing (uHAST).
• Finite Element Analysis (FEA).
• Data analysis using Excel, Python, or MATLAB.

Compensation

• $80,000–$120,000 annual base salary.
• Health, dental, and vision insurance, with 75% of premiums covered for employees and dependants.
• Unlimited paid time off.
• 14 paid holidays per year.
• Up to 10% travel to customer and supplier sites.