Saving the World! Help Wanted…

Budderfly is a fast-growth, private equity-backed energy management outsourcing company that is committed to reducing global carbon emissions for small to medium sized enterprises. We are the premier sustainability partner for businesses with repeatable footprints such as restaurant chains, assisted living facilities, retail franchises, and more. Budderfly installs, monitors, and manages a combination of patented technologies, equipment upgrades, and proprietary energy software to help deliver complete energy saving solutions for our customers.

Celebrating 5 years on Inc. 5000 America’s Fastest-Growing Private Companies list. Recognized in Time Magazine’s Best Inventions of 2025.

We are an energetic and dedicated team working together to make a positive impact on the environment while providing an excellent customer experience. We are growing quickly and looking to add talented people who are passionate about making the world a better place!

Senior Mechanical Engineer

Location: Hybrid preferred ,Shelton, CT or remote USA considered

Saving the World! Help Wanted

Budderfly is a fast-growth, private equity-backed energy management outsourcing company that is committed to reducing global carbon emissions for small to medium sized enterprises. We are the premier sustainability partner for businesses with repeatable footprints such as restaurant chains, assisted living facilities, retail franchises, and more. With zero upfront investment, Budderfly installs, monitors, and manages a combination of patented technologies, equipment upgrades, and proprietary energy software to help deliver complete energy saving solutions for our customers.

Ranked #2 in energy companies and #10 overall on the 2021 Inc. 5000 America’s Fastest-Growing Private Companies list.

Why this Role is Important

We are hiring a Senior Mechanical Engineer to join our Engineering team within Field Operations, reporting to an Engineering Manager as an individual contributor. Your primary focus is scaling our Ultra-High-Performanace, UHP program, our high performance HVAC and electrification offering built on VRF, heat pump and dedicated ventilation (ERV and DOAS) systems.

You will develop and quality-check the designs and scopes of work behind UHP installs, set the standards that make them repeatable across site types, and support installation and commissioning. As the program matures, there will be opportunities to support controls, hydronic and other engineering needs across Field Operations.

Depending on the project, your output may be a full design package, an engineering analysis, or a clear scope of work for a contractor to price and build from. You will work closely with teams across the company, including but not limited to IoT, Technology, Performance Analysis, Service, Project Management and Project Engagement.

Responsibilities

HVAC UHP design, standards and quality

Develop designs and scopes of work for UHP projects, including load calculations, ventilation and air balance, equipment selection and sizing, refrigerant piping and schedules.
Design ERV and DOAS ventilation systems for UHP sites.
Develop and maintain design standards for repeatable site types, so UHP can scale.
Perform technical QC review of UHP designs and scopes of work prepared by the wider team, and coordinate with third-party MEP firms when stamped documents are required.
Evaluate where VRF fits on payback and incentives, including where it can extend beyond the industry’s typical applications, and help refine our approach as UHP expands.
Support installation, commissioning and post-install troubleshooting with Project Management, field teams, Service, contractors and manufacturers.

Supporting areas, as workload allows

Collaborate with IoT and Technology on controls requirements for UHP systems, and review OEM sequences of operation for the equipment we buy and inherit.