7.3. Mechanical Engineer II

Team: 7. Downstream Engineering

Location: Burlington, MA

Commitment: Full Time

Workplace Type: onsite

Key Responsibilities:

• Own mechanical systems and equipment from early concept development through design, fabrication, testing, commissioning, and deployment.  
• Design and develop novel processing equipment for high-temperature electrolysis, furnace systems, and critical metals production technologies. 
• Create 3D CAD models, assemblies, drawings, and technical documentation using SolidWorks to support fabrication, procurement, assembly, installation, and commissioning. 
• Select and specify critical mechanical components and mechanisms, including pumps, bearings, lead screws, actuators, seals, thermal components, fixtures, and industrial hardware based on engineering analysis and test data. 
• Develop and execute verification and validation plans for components, subsystems, and integrated equipment to prove performance, reliability, and readiness for deployment. 
• Use Design of Experiments, structured testing, and data analysis to validate new concepts, troubleshoot equipment performance, and make sound engineering decisions. 
• Build, assemble, modify, and commission mechanical tooling, fixtures, prototypes, and pilot-scale equipment in hands-on lab, R&D, and production environments. 
• Apply V-Model system development principles to connect requirements, system architecture, detailed design, integration, testing, validation, and deployment. 
• Investigate mechanical, thermal, vacuum, and process-related issues, identify root causes, and implement practical design improvements that move technology forward. 
• Drive rapid design-build-test iterations with urgency while maintaining sound engineering judgment, safety, and documentation discipline. 

Qualifications:

• Bachelor’s degree in Mechanical Engineering or a related engineering discipline.  
• 3+ years of mechanical engineering experience designing, building, testing, and commissioning complex equipment, industrial systems, process hardware, or R&D systems.  
• Familiarity with V-Model (V-Diagram) based system development methodologies 
• Strong SolidWorks experience, including part design, assemblies, detailed drawings, and design documentation for fabrication and assembly. 
• Experience developing and executing test plans for system, subsystem, or component verification and validation. 
• Experience selecting and integrating mechanical components such as pumps, actuators, bearings, lead screws, seals, fasteners, thermal systems, and industrial hardware.  
• Hands-on experience with mechanical tooling, fixtures, prototype assembly, equipment troubleshooting, and commissioning in a lab, pilot, manufacturing, or industrial environment. 
• Able to wear a respirator
• Ability to lift up to 50lbs

We offer a competitive compensation package that is based on expertise. We also offer the following benefits:

This pay range reflects best estimate for the total cash compensation which includes salary + discretionary bonus for this role. Total package may vary based on experience and qualifications.


Pay Range: $90,000- $120,000 total cash compensation plus equity
• Healthcare: 100% Medical, dental, and vision coverage for employee.
• Stock Options: Ownership in a fast-growing venture-backed company. 
• Time Off: Unlimited PTO. 
• Learning: Learning and development opportunities to grow your skills and career.