Principal BESS Engineer – Procurement & Performance

About the role

AECOM is seeking a Principal BESS Engineer to lead technical and commercial advisory services for utility‑scale battery energy storage systems. The role focuses on Owner’s Engineer and procurement engagements, guiding clients on sizing, specification, evaluation and contracting of BESS projects.

Key responsibilities

• Lead BESS Owner’s Engineer and technical advisory across feasibility, procurement, design, construction, commissioning and operation.
• Define duty profiles, performance bases and develop Principal’s requirements and technical schedules.
• Assess OEM and integrator proposals, support tender evaluations and negotiate performance guarantees, warranties and service obligations.
• Review BESS architecture and interfaces, coordinating specialists in electrical, civil, fire, grid and operational domains.

Required profile

• 8+ years of experience in utility‑scale BESS projects covering development, procurement, delivery or operation.
• Proven ability to move between system sizing, technical specifications, vendor proposals and contract schedules.
• Experience preparing procurement documentation, evaluating bids and supporting commercial negotiations.
• Professional registration or working towards registration on the National Engineering Register in Australia (e.g., RPEV, RPEQ) is desirable.

Required skills

• BESS technology, including cells, modules, racks, battery management systems and power conversion systems.
• Energy management or plant control systems, medium‑voltage balance of plant, grid connection, thermal management and fire safety.
• Technical due diligence, tender evaluation, contract negotiation and performance guarantee assessment.
• Factory and site acceptance testing, commissioning and verification of contractual performance.