Manufacturing Engineering Co-op - Summer 2026

About This Role

Ready to shape the future of manufacturing? As a Manufacturing Engineering Co-op at Rennscot MFG, you'll be at the forefront of additive manufacturing technology while building a comprehensive skill set across advanced manufacturing processes. This hands-on role puts you in the center of our additive manufacturing operations, where you'll work with cutting-edge 3D printing technologies, optimize build processes, and support post-processing workflows. You'll also gain valuable experience in CNC machining and CAM programming, giving you a complete understanding of how additive and subtractive processes work together to create exceptional products.

What You'll Do

• Lead Additive Manufacturing Operations

• Plan, setup, and execute additive manufacturing builds using industrial 3D printing systems

• Optimize build orientation, support structures, and process parameters for quality and efficiency

• Post-process additively manufactured parts including support removal, heat treatment, and surface finishing

• Troubleshoot build failures and drive continuous improvement in additive processes

• Develop and refine manufacturing processes for new additive technologies and materials

• Bridge Additive and Subtractive Manufacturing

• Create, simulate, and verify CNC programs for 3-, 4-, and 5-axis milling and turning centers using hyperMILL, ESPRIT & Fusion 360

• Design hybrid manufacturing workflows that combine additive and subtractive processes

• Support machining operations for post-processing additive parts and traditional CNC production

• Collaborate with machinists on setup, prove-out, and first-article validation

• Engineer Better Processes

• Design and fabricate workholding and fixturing for both additive and subtractive processes

• Contribute to process development, refining toolpaths and cut strategies for improved quality

• Participate in root cause analysis and corrective action for production issues

• Document manufacturing processes, build parameters, and setup procedures for repeatability

• Keep Production Moving

• Operate CNC machinery and additive systems to support prototype and production work

• Perform setup, inspection, and basic troubleshooting across manufacturing equipment

• Support continuous improvement projects focused on machine utilization and process capability

• Cross-train with Quality and Assembly teams based on business needs

What We're Looking For

• You've Got the Foundation

• Pursuing a Bachelor's degree in Mechanical, Manufacturing, Industrial Engineering, or related field

• Interest in additive manufacturing technologies and processes

• Familiarity with CAD software (Fusion 360, SolidWorks, or similar)

• Understanding of CNC machining and subtractive manufacturing concepts

• Exposure to CAM software (ESPRIT, hyperMILL, Fusion 360, or similar)

• Strong attention to detail and eagerness to learn

• Ability to work both independently and collaboratively

• Bonus Points If You Have

• Experience with additive manufacturing systems (FDM, SLA, SLS, metal printing, etc.)

• Knowledge of additive design principles and topology optimization

• Operated CNC machines (mills or lathes), especially Heidenhain, Okuma, & Haas controllers

• Understanding of G-code and machine setup

• Can read and interpret engineering drawings with GD&T

• Exposure to Lean Manufacturing or Six Sigma principles

• Experience with additive post-processing techniques

Who You Are

• Future-focused – You're excited about how additive manufacturing is transforming industry

• Technically curious – You want to understand both the art and science of manufacturing

• Hands-on learner – You'd rather build and iterate than just read about it

• Process-minded – You see manufacturing as a system and love optimizing it

• Problem-solver – When a build fails or a process breaks down, you're energized to figure out why

• Detail-oriented – You know that parameters matter and documentation prevents problems

• Cross-functional – You're comfortable moving between additive, subtractive, and other manufacturing processes

• Improvement-driven – You're always asking "how can we make this better?"

• Adaptable – You thrive in a dynamic environment where priorities shift and technologies evolve

• Collaborative – You work well with machinists, engineers, and other team members to get results

About Rennscot MFG

Rennscot MFG, founded in 2017, started as a motorsports-focused shop in the aftermarket automotive industry. Now, they are a leading provider of advanced manufacturing services located in Woburn, MA. Rennscot MFG strives to be more than just a machine shop; they solve problems in innovative ways, using a suite of integrated services to fuel a passion for ideation. With a focus on diversifying into commercial and critical technology sectors, Rennscot MFG delivers cutting-edge technologies and unwavering commitment to quality. They offer a comprehensive range of services, including reverse engineering, metal & polymer additive manufacturing, and precision machining to support various industries’ needs. For more information, visit rennscotmfg.com.

ITAR Requirement

To conform to US Government export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a US citizen, lawful permanent resident of the US, protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the US Department of State. Learn more about the ITAR here: https://www.pmddtc.state.gov/ddtc_public/ddtc_public?id=ddtc_public_portal_itar_landing.

EEO Statement

Rennscot MFG is an Equal Opportunity Employer; employment with Rennscot MFG is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.