Mechanical Engineer, Process & Mechanical

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.

The Mechanical Engineer - Process & Mechanical will support the execution of industrial and capital projects from concept development through startup and commissioning. This role offers a dynamic mix of technical design work, cross-functional collaboration, and hands-on project support. As a key contributor, you will develop process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), heat and material balances, and equipment specifications, while participating in design reviews, requirements gathering, and vendor coordination. You will create detailed engineering drawings and process models using CAD and simulation (FEA & CFD) tools, and support the preparation of technical reports and project documentation. This position offers an opportunity to work closely with senior and principal engineers, contributing to your ongoing technical and professional development—including pursuing a Professional Engineer (PE) license. You will engage in internal and client-facing meetings, assist with project proposals and estimates, and coordinate with a wide range of disciplines, including mechanical, structural, electrical, and controls teams, as well as fabrication and field service personnel.

Support Process & Mechanical Engineering Projects 
Contribute to mechanical and process engineering scope on projects from concept development through startup and commissioning. Facilitate requirements gathering, concept and preliminary design, PFD and P&ID development, heat and material balance evaluation, equipment list creation, materials of construction selection, code and standard research, fabrication and assembly support, and vendor engagement.

Develop Technical Designs and Documentation  
Create drawings, schematics, and diagrams utilizing CAD, process diagramming, and process simulation software/tools (FEA & CFD). Support, and occasionally lead, the development and writing of technical reports and project documentation.

Collaborate and Grow Professionally
Work closely with a senior or principal engineer mentor to define and execute personal and professional development goals, including pursuing your Professional Engineer (PE) license. Participate in internal and client-facing project meetings and design reviews. Collaborate with project managers to plan, manage, and execute tasks.

Contribute to Business Development
Support project estimating, proposal development, and schedule creation in partnership with the project management and business development teams.

Work Across Disciplines 
Collaborate with mechanical, structural, electrical, and controls engineers and designers, as well as fabrication and field service teams, to deliver integrated solutions.

We are a company who is going to make a difference in the industries and the communities in which we choose to operate. Every employee of Re:Build will share ownership in the company and will share in the financial rewards of the success we achieve together, at all levels of the company! We want to work with people that reflect the communities in which we operate.

Re:Build Manufacturing is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, marital status, parental status, cultural background, organizational level, work styles, tenure, and life experiences. Or for any other reason.

Re:Build is committed to providing reasonable accommodation for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, you may contact us at accommodations.ta@ReBuildmanufacturing.com or you may call us at 617.909.6275.