Senior BESS Project Engineer

Ameresco, Inc. (NYSE:AMRC) is a leading energy solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the global energy transition. We are a trusted, full-service partner to public sector and government entities, K-12 schools, higher education, utilities, and healthcare customers across the U.S., Canada, the U.K., and Europe. At Ameresco, we show the way by developing, constructing and operating tailored smart energy efficiency solutions, distributed energy resources, and infrastructure upgrades that drive cost savings, resilience, decarbonization, and innovation.

Our comprehensive portfolio is built to address the challenges of today and adapt the future, ensuring long-term sustainability and success for our customers.

Ameresco is seeking a Senior BESS Project Engineer to join our growing Renewable Energy team. This is a Senior level role for an experienced engineer who can independently lead complex Battery Energy Storage System (BESS) projects through design and development, and support integration and commissioning efforts, while serving as a technical resource and leader for the team. This is a remote position joining a partially remote team with home office based in the Phoenix, AZ area.

This role is focused primarily on behind-the-meter (BTM) battery energy storage system (BESS) projects, serving as the technical owner of system integration and controls scope from design through commissioning. Knowledge of front-of-the-meter (FTM) projects is also beneficial. The Sr. BESS Project Engineer reviews single line diagrams (SLDs) and system designs for accuracy and constructability while working closely with subcontract engineers and internal Ameresco departments to ensure that data monitoring equipment, protective relays, controllers, and related equipment are correctly specified, designed into the system, programmed, and installed per plan.

The role then supports construction and commissioning resources in the field through utility and project-required testing to confirm proper system functionality prior to energization and handoff to operations. While the primary focus is BTM projects, this role is expected to be available to consult with front-of-meter (FTM) project teams and subject matter experts as needed.

Review single line diagrams (SLDs), control schematics, and BESS system designs prepared by subcontract engineers and vendors across multiple concurrent projects, with final approval authority on accuracy, completeness, and compliance with project and utility requirements. Direct or personally confirm that data monitoring equipment, protective relays, controllers, meters, and communication/networking equipment are properly specified and designed into the system architecture; review and validate work product from self, subcontract engineer, and junior engineers.

Serve as primary point of coordination with internal Ameresco departments (engineering, procurement, construction, and operations) to align equipment selection and system architecture with project requirements and company standards. Lead review of vendor and subcontract engineer submittals, control narratives, and points lists for BESS controllers, PCS, EMS/BMS, and site controllers. Identify and resolve complex design gaps, conflicts, or constructability issues between electrical, controls, and monitoring scopes prior to installation, escalating and driving resolution across teams.

Direct subcontract engineers and controls integrators to ensure relays, controllers, and monitoring equipment are programmed in accordance with approved design intent and sequence of operations. Verify…