About the role#
The Mechanical Engineering Intern will support the design, development, and testing of mechanical components and systems across active product development programs. You will work alongside senior engineers, cross-functional partners, and technicians to prototype concepts, troubleshoot issues, and improve product performance. This role provides hands-on experience with real engineering challenges and exposure to the full product development lifecycle.
What you'll do#
- Assist with the design, modification, and identification of commercial items like robotics, mechanisms, fluidics components, and mechanical subassemblies.
- Perform analyses and experiments to evaluate products, designs, or processes using mathematical techniques, specialized software, FEA, and tolerance stack-up.
- Produce 3D CAD part files, assemblies, and associated drawings.
- Build and evaluate engineering prototypes.
- Prepare engineering specifications, procedures, and technical documentation for reports and proposals.
- Conduct lab and field testing for new or existing applications.
- Perform other related duties as assigned.
What you'll need#
- Current enrollment in a Bachelor of Science or Master's degree program in Mechanical Engineering or an equivalent major, with at least one year of the program completed.
- Proficiency in 3D CAD software, with SolidWorks preferred.
- Practical experience with Geometric Dimensioning and Tolerancing (GD&T) and tolerance stack analysis.
- A working understanding of design for manufacturing processes such as machining, sheet metal, welding, casting, thermoforming, and injection molding.
- Strong problem-solving, debugging, and organizational skills.
- Proficiency with the Microsoft Office suite.
- Strong communication and teamwork skills.
Location & details#
- Location: Merrimack, New Hampshire, USA.
- Modality: On-site.
- Employment type: Full-time.
- Term: Rolling.
- Compensation: Paid position.
About HiArc
HiArc is a medical equipment manufacturer based in Merrimack, New Hampshire. Founded in 1980, the company employs between 201 and 500 people. It specializes in engineering and manufacturing complex medical technologies for the life sciences and laboratory automation sectors. The company operates as a partner to its clients by integrating design, engineering, and manufacturing into a single process.
How to get in at HiArc
Securing an internship at HiArc requires speed because early applicants often reach recruiters before the candidate pool becomes unmanageable. Intern Insider sends an instant alert the moment a role matching your target is published, which helps you apply among the first and increases your chances of being seen. Applying early is a practical advantage when competition for technical roles is high. Intern Insider also surfaces the recruiters behind the company roles so you can reach out directly to ask about the position or a referral. Reaching out to a recruiter directly often improves your response rates compared to submitting an application into a queue. This approach allows you to demonstrate genuine interest in the engineering work at HiArc.



