Senior Mechanical Engineer - Machine Design

At Re:Build Optimation, we specialize in delivering custom-engineered process equipment and automated systems to clients across the globe. With nearly 40 years of experience in complex chemical process systems, we have built a reputation for precision, reliability, and innovation. Our multidisciplinary team of 70+ engineers, designers, and programmers, combined with 150,000 square feet of fabrication space and over 70 skilled tradespeople, allows us to provide full turnkey solutions—from initial concept through fabrication, installation, and commissioning. 

As part of Re:Build Manufacturing, we leverage the strength of a national industrial powerhouse while maintaining the agility and personalized service of a specialized firm. We serve industries ranging from traditional and green energy to chemicals, pharmaceuticals, food & beverage, glass, and advanced manufacturing, offering tailored solutions that optimize efficiency and performance. 

At Re:Build Optimation, we believe in a collaborative approach, working closely with our clients to develop solutions that align with their unique operational goals. Our deep industry expertise and end-to-end capabilities make us the ideal partner for companies seeking cutting-edge automation, process control, and engineered systems. 

Who We Are Looking For

You will excel in this role if you:

• Are a seasoned Mechanical Engineer with strong technical depth and a passion for solving complex problems.
• Enjoy leading large or multi-disciplinary engineering projects from concept through completion.
• Are comfortable engaging with clients, participating in client growth activities, and representing technical expertise during proposals and meetings.
• Thrive in environments where innovation, continuous improvement, and technical perfection are expected.
• Enjoy mentoring junior engineers and guiding design teams through challenging technical problems.
• Bring a strong safety approach and incorporate HSE considerations into engineering decisions.
• Are motivated by seeing your engineering work come to life in real-world applications.

If this sounds like you, you’ll flourish at Re:Build Optimation.

What You Will Do

As a Senior Mechanical Engineer, you will:

• Lead the planning, coordination, and execution of major engineering projects or multiple large, complex assignments.
• Serve as project manager or field lead, integrating scheduling, budgeting, resource planning, and engineering execution.
• Drive Health, Safety, and Environmental (HSE) principles and promote a culture of safety excellence.
• Serve as a technical specialist, applying advanced engineering theories, methods, and analysis tools.
• Solve complex engineering challenges, conduct research, and develop innovative solutions aligned with project goals.
• Prepare and manage proposals, estimates, risk analyses, and technical documentation.
• Develop and maintain project schedules using tools like Microsoft Project or Deltek Vision.
• Participate in business development initiatives (“Small Game” client engagement and “Big Game Hunting” strategic pursuits).
• Lead client meetings and internal design reviews, ensuring technical quality and alignment with requirements.
• Create design standards, perform engineering calculations, and oversee detailed mechanical drawing sets.
• Mentor and develop junior engineers, offering technical guidance and constructive performance feedback.
• Build strong client relationships by understanding their needs, constraints, and goals.
• Travel occasionally for site visits, design reviews, installations, or client collaboration.

What You Bring

• Bachelor’s degree in Mechanical Engineering or a related field required, or equivalent experience accepted.
• Over 8 years of advancing machine design experience, encompassing industrial automation, custom tooling, robotics, motion systems, sensors, and associated technologies.
• Over 8 years of experience working with SolidWorks; familiarity with FEA/CFD tools is highly desirable.
• Professional Engineer (P.E.) license or eligibility strongly preferred.
• Ability to develop PFDs, P&IDs, and other visual documentation for process and machine design.
• Demonstrated ability to lead complex projects and multi-disciplinary teams.
• Strong skills in engineering design principles and project management methodologies.
• Proficiency in software such as SolidWorks, Microsoft Project, and Deltek Vision.
• Excellent communication, analytical, and client relationship management skills.
• Passion for mentoring talent and fostering a collaborative, high-performance engineering culture.

Why Join Re:Build?

• Employee Ownership – everyone shares in our growth and long-term success.
• Meaningful Work – your engineering decisions will directly impact real-world industrial processes.
• Career Growth – gain exposure to diverse industries, technologies, and cross-functional teams.
• Innovation Forward – work with brand new tools, techniques, and engineering methods.
• People-Centric Culture – supportive, collaborative, and committed to continuous improvement.

Compensation Range: Annual salary for this position is expected to be between $91,000 to $137,000 plus participation in our annual bonus plan and long term incentive plan.  

Diversity & Inclusion

Re:Build Manufacturing is proud to be an Equal Employment Opportunity and Affirmative Action employer. We welcome individuals of all backgrounds, identities, experiences, and perspectives.

We are committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application process. Contact accommodations.ta@ReBuildmanufacturing.com or call 617-909-6275 for assistance.