Senior Mechanical Engineer

About Harris Group

Harris Group thrives on providing expert engineering for today’s most complex challenges. We deliver multi‑disciplinary services across a wide range of project types, and our successes are directly tied to high‑quality collaboration across all offices, expertise, and backgrounds. Harris Group is a 100% Employee‑Owned company focused on the people in the company, the clients we serve, and the communities in which we live.

You’re not just an employee here. You’re an owner. Harris Group is 100% employee‑owned through our Employee Stock Ownership Plan (ESOP) which means when you join Harris Group, you receive an ownership stake in the company. Over time, this becomes a meaningful wealth‑building vehicle that compounds alongside your career. You’ll have clear line of sight to how your work, projects, and client relationships contribute to the company’s value and by extension, your own.

For a Senior Mechanical Engineer who’s ready to lead, build client relationships, and invest in the long‑term success of the firm, ownership isn’t just a perk. It’s the point.

• Variety of project types:
  Life Sciences, Industrial Manufacturing, Biofuels, Chemical Plants, Pulp & Paper, Fuel Terminals, and Commercial Facilities
• Multi‑disciplinary teams: daily collaboration with engineers and architects across all disciplines
• Real ownership stake through Harris Group’s Employee Stock Ownership Plan (ESOP)
• Career growth: opportunities to lead teams, mentor junior engineers, and expand client relationships
• Training & Education Assistance to support your career goals and PE‑related professional development
• Flexible work: hybrid opportunities from our Portland, OR office
• Competitive benefits: health, dental, and vision insurance, life insurance, 401(k) with company matching, PTO, and paid holidays
• A passionate, collaborative team focused on excellence in delivery and supporting the people who deliver it

Harris Group is seeking a Senior Mechanical Engineer to join our Portland, OR office. This role is responsible for providing professional engineering expertise to projects that positively impact the community and the environment. You will work on innovative designs and see diverse projects through development, detailed design, commissioning, and construction support.

This Senior Mechanical Engineer will work primarily on projects within industrial manufacturing, life sciences (biopharmaceutical), pulp and paper, and fuel terminal piping and tanks. Additional projects may include process industries, air and seaports, energy, commercial development, and other business sectors.

The ideal candidate brings an entrepreneurial mindset and genuine passion for mechanical and process engineering, takes ownership of their work, communicates proactively with teammates and clients, and thrives in a multi‑discipline environment.

• Serve as a senior technical resource on complex designs, advancing engineering theories, concepts, principles, and processes
• Perform mechanical design, collaborating with the mechanical staff and coordinating with other disciplines on specific projects
• Prepare design calculations and documentation that support the project design basis
• Prepare mechanical drawings through designers or drafters, and develop specifications
• Coordinate design with vendor‑supplied equipment
• Prepare equipment layouts and general arrangements
• Prepare construction bid packages and construction specifications
• Assist in the preparation and presentation of proposals, including scope of services and fee estimates
• Support business development activities, including client relationship building and proposal input
• Mentor and provide technical guidance to junior and mid‑level engineering staff

• Bachelor’s degree in Mechanical Engineering and a minimum of 7 years of relevant experience
• Registration as a Professional Engineer (PE) is required
• Working knowledge of facility and building mechanical systems including HVAC and plumbing
• Familiarity with process system design and equipment such as pumps, fans, heat exchangers, cooling towers, boilers, chillers, conveyors, and air handlers
• Ability to identify,…