Posted on:June 10, 2026

Principal Mechanical Engineer, Process Equipment at Boston Materials

Boston Materials is hiring a Principal Mechanical Engineer, Process Equipment in Billerica, MA, US. On-site. Pay: USD 160k-190k/yr.

About Boston Materials

Boston Materials develops advanced energy transfer materials, including high-performance thermal interfaces for semiconductor cooling. Its products are used in aerospace, automotive, and electronics industries, with a focus on thermal management and semiconductor packaging for AI and high-performance computing applications.

Principal Mechanical Engineer, Process Equipment job description

Boston Materials produces advanced materials with enhanced energy transfer properties using its patented Z-axis Carbon Fiber technology. The Company's products solve critical performance bottlenecks in applications spanning thermal, electrical, and structural use cases. Its breakthrough Liquid Metal ZRT thermal interface material is designed to solve thermal chokepoints that are facing the next generation of AI and HPC silicon. For more information, visit https://www.bomaterials.com/

THE OPPORTUNITY

A career-defining opportunity rarely offers all of the following:

Direct connection to the mission. Gain a clear understanding of the business and see how your work directly shapes outcomes. With no unnecessary layers, silos, or bureaucracy, every team member contributes meaningfully to the company's success and has the responsibility to drive real impact.

Growth beyond a single role. At Boston Materials, you are not defined by your past experience or limited by a job description. Working alongside leading experts in the field, you will take on new challenges, broaden your expertise, develop new capabilities, and take ownership of projects that matter – while contributing to the broader success of the organization.

Work on problems that matter. Help solve some of the most pressing challenges in the Advanced Semiconductor, AI Infrastructure, and Advanced Materials industries. Boston Materials offers a rare combination of purpose, autonomy, and impact. We invite you to join us.

The Role

Boston Materials is seeking a highly skilled and hands-on Principal Mechanical Engineer, Process Equipment to lead the design, build, and commissioning of specialized production equipment used to manufacture our advanced materials. This role is ideal for an engineer who thrives at the intersection of mechanical design, automation, and process engineering. You will be responsible for delivering highly automated, instrumented, and reliable custom machines that enable Boston Materials’ next-generation production capabilities. The role demands a seasoned engineer with a proven track record of taking complex system and machine designs from concept to production on tight schedules—balancing innovation, practicality, and attention to detail at every step.

Join us to solve one of the most critical challenges facing the Semiconductor and Electronics Industry – thermal management!

Your Responsibilities

Design, build and commission production-grade equipment to automate novel manufacturing processes for advanced materials.
Design and requisition mechanical machinery and components using CAD (SolidWorks preferred), ensuring design specifications are met, and manage design files, revisions, and workflows within a Product Data Management (PDM) system
Integrate structure, safety systems, automation, HMI, sensing, data acquisition, SPC and health monitoring / alerting for precise manufacturing and high duty cycle operation.
Starting from a problem statement, clarify and fully define requirements, develop a solution in collaboration with stakeholders; design, test and iterate to meet requirements, leading the project while drawing effectively on needed resources.
Accurately estimate and regularly update timetables to ensure on-time delivery of new machine builds, and early resolution of timeline risks.
Evaluate, downselect and validate subsystems and components, drawing on experience and industry best practice to maximize robustness and future expansion.
Rapidly design and launch pilot-scale equipment for new process development.
Respond to feedback and feature requests to improve workflow efficiency, quality and safety.
Conspicuously exemplify high standards of safety, organization, communication and documentation.
Mentor and oversee work of mechanical engineers and assembly technicians.
Diagnose and resolve electrical and mechanical issues in assemblies and machinery. Collaborate with tech support and purchase necessary parts and equipment as needed.
Operate machinery such as waterjets and mini-mills to fabricate parts as required for assemblies. Assist in general machining tasks as needed.
Work effectively in a startup or small company setting. Embrace challenges, adapt to changes, and continuously seek to improve processes and methods.

Your Skills and Expertise

8+ years designing, building, and commissioning custom capital equipment in advanced materials, semiconductor packaging, battery, display, web converting, or other environments where the fidelity of a chemical or materials process must be preserved by the equipment design

Proven track developing first-of-kind equipment, from concept to production, and a demonstrated ability to deliver elegant solutions to complex problems

Hands-on experience with FAT, SAT, and equipment qualification

Proven ability to build, test, and troubleshoot complex electro-mechanical assemblies, from concept to commissioning.

Working knowledge of 5S principles, design review processes, hazard analysis, and engineering controls to ensure safety and reliability.

Continuous improvement mindset with a strong drive to refine designs and manufacturing processes for performance and reliability.

Proficiency with CNC machining, hand tools, and power tools used for assembly, debugging, and fixture fabrication.

Summary of Benefits

Health, Vision & Dental – Boston Materials pays 75% of Health, Vision and Dental Care coverage for employee and dependents

4 weeks of supplemental Paid Parental and Family Leave

Unlimited Paid Time Off

Holidays: 14 days/year

Boston Materials is an EOE and at the forefront of materials innovation, the key to which is diverse teams with unique backgrounds and experiences. We are committed to employing a diverse workforce with equal employment opportunities regardless of race, color, religion, sex, national origin, age, sexual orientation, gender identity, gender expression, marital status, veteran status, or disability.

Applicants must be currently authorized to work in the US on a full-time basis.

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