HVAC and Piping Mechanical Engineering Intern - Summer 2026

HNTB Corporation•Seattle, WA

5d•$21 - $40

About The Position

At HNTB, you can create a career that is meaningful to you while building communities that matter to all of us. For more than a century, we have been delivering solutions for some of the largest, most complex infrastructure projects across the country. With our historic growth, it is an exciting time to join our team of employee-owners. Our Bellevue office is seeking a HVAC and Piping Mechanical Engineering Intern for the summer 2026. The Mechanical Engineering team specializes in the design of central heating and cooling plants, piping distribution, efficient energy generation and jet fuel systems that support airport infrastructure. We deliver utility strategic plans to airports that focus on reducing energy, water and greenhouse gas emissions. Our team develops and optimizes HVAC, plumbing, and piping systems; conducts thermal energy analyses; performs heating and cooling load calculations; and prepares technical documentation, mechanical drawings, and field observations. They also contribute to sustainability studies and system-performance optimization to ensure efficient heat transfer, reliable airflow, occupant comfort, and overall mechanical effectiveness across major infrastructure projects. This opportunity entails being responsible for assisting assigned department(s) and/or project(s) by performing basic engineering related tasks which may reflect elements of standard post-secondary engineering curriculum Relocation and housing are not available for this position.

Requirements

High School Diploma/GED or equivalent plus current enrollment in an accredited post-secondary engineering program
Understands engineering, geometric, and algebraic principles at a basic level.
Shows proficiency with Microsoft Office Suite.
Accepts and applies direction from peers and supervisors.
Obtains an understanding of introductory shop drawing and submittal procedures and requirements.
Ability to perform basic engineering calculations
Ability to organize information for use in drawings or other documents

Nice To Haves

Pursuing a degree in Mechanical Engineering
Knowledge of thermodynamics, heat transfer, and fluid dynamics
Strong interest in HVAC and Utilities
Familiarity with software like AutoCAD, Revit, or MATLAB
Previous internship in HVAC or utilities

Responsibilities

Assists engineer teams in various tasks and duties.
Assists Engineer with research, development and design of projects.
Assists Engineer with the preparation of engineering drawings and documents as assigned.
Performs other duties as assigned.