Lead Mechanical Engineer (HVAC and Plumbing)

Join our team! Our mission is BUILDING COMMUNITIES. IMPROVING LIVES. With a history spanning over 110 years, HR Green has consistently delivered on this mission, establishing alike. Each day, we work to find solutions that inspire our employees and fit our clients' needs to build trust to exceed their expectations. Our people are the heart of our success. We've earned national recognition, including being named a Great Place to Work and consistently ranking on Engineering News Record's Top 500 Design Firms in the United States and we're still growing!

Summary

We are seeking a Lead Mechanical Engineer to play a key role in delivering complex projects across municipal and industrial markets focusing on the design of HVAC, plumbing, and fire protection systems for water and wastewater infrastructure, treatment facilities, pumping stations, and process buildings.

In this role, you will take ownership of mechanical design efforts from concept through construction, working directly with clients and multidisciplinary teams to deliver high-performing, resilient infrastructure. Unlike larger, highly segmented organizations, you will have the opportunity to influence design decisions, interface directly with clients, and see the full lifecycle of your projects.

Our projects span water and wastewater treatment, conveyance, and industrial facilities—including partnerships with municipalities and within the food and beverage sector—offering both technical variety and real-world impact on community infrastructure.

### What You’ll Do

• Lead the design of HVAC, plumbing, and fire protection systems for water and wastewater treatment facilities
• Serve as a technical authority on mechanical systems in challenging environments (explosive, corrosive, high-moisture, odor-controlled spaces, hazardous)
• Drive design from planning and concept development through final design and construction support
• Collaborate closely with proc...