Mechanical Engineering Intern

Twenty-Six Defense
Merrimack, New Hampshire, United StatesPosted Sep 10, 2026
Hardware / Engineering

About the role

Company Information

At HiArc, we believe clients don’t need another vendor; they need a strategic partner who gets it. One who listens harder, thinks deeper, and builds smarter—around their needs, products, and goals. HiArc engineers and manufactures complex medical technologies with one goal in mind: creating the perfect fit for our clients. No off-the-shelf thinking. No compromises. Just a tailored, high-performance solution our clients need, the way they need it. That’s why HiArc is the most client-centered partner in the market. We fuse design, engineering, and manufacturing into a seamless, collaborative process—crafted entirely around our clients. We operate as an extension of our clients' teams, de-risking their processes and accelerating their path to market. And the result is a solution you won’t find anywhere else. Join our team! We hire experts in hardware and software design, robotics, optics, fluidics, chemistry integration, motion and thermal control, risk management, supply chain management, performance testing, advanced manufacturing techniques, finance, human resources, sales, and marketing. For more information, please visit HiArc.

Overview

The Mechanical Engineering Intern will support the design, development, and testing of mechanical components and systems across active product development programs. Responsibilities may include assisting with CAD modeling and drawing updates, performing engineering analyses, building and executing test plans, collecting and interpreting data, and documenting results to support design decisions. The intern will collaborate closely with 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, exposure to the full product development lifecycle, and the opportunity to contribute meaningful work in a fast‑paced, team‑oriented environment.

Responsibilities

Assist

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