Sr. BESS Electrical Engineer

Primoris Services Corporation•Aurora, CO

About The Position

Primoris Renewable Energy is seeking a Sr. Electrical Engineer specializing in Battery Energy Storage Systems (BESS). This role involves leading the development of preliminary design concepts, providing technical documentation, overseeing detailed design, and offering lifecycle leadership for BESS projects. The engineer will also be responsible for developing and maintaining electrical engineering calculation tools, collaborating with various teams for design optimization, and mentoring junior engineers and designers. Key responsibilities include owning and improving the database of equipment and design standards, directing the development of construction deliverables, leading the design process from conceptual to Issued for Construction (IFC) stages, reviewing utility interconnection documentation, applying cost optimization strategies, and providing technical leadership during project execution. The role also emphasizes utilizing company-approved tools, driving continuous improvement, and analyzing historical project data for design enhancements.

Requirements

Bachelor’s degree in Electrical Engineering or related field, or equivalent industry experience
5–8 years of experience in renewable energy, including at least 3 years in utility-scale BESS or Solar PV design
Proven experience leading engineering design efforts on large-scale energy projects
Advanced proficiency with AutoCAD Civil 3D, PVsyst, SAM, ETAP, CYMCAP, PVSOL (BESS Design), and Python

Nice To Haves

Deep understanding of BESS and PV system architecture including inverters, transformers, and protection systems
Strong ability to interpret manufacturer specifications and translate into optimized, constructible designs
Extensive experience developing BESS site plans and single-line diagrams (AC and DC systems)
Strong prioritization and multitasking skills with ability to manage multiple projects independently
Ability to lead effectively in a fast-paced, dynamic environment
High level of organization and attention to detail
Experience mentoring junior engineers and supporting team development

Responsibilities

Lead development of preliminary design concepts for Battery Energy Storage Systems (BESS) using advanced engineering principles and industry best practices
Provide high-level technical documentation and guidance to Estimating, Business Development, and Proposal teams to support project pursuits
Oversee and contribute to detailed design development for awarded BESS projects, ensuring accuracy and constructability
Provide lifecycle design leadership and optimization support from concept through commissioning and operations
Develop, standardize, and maintain electrical engineering calculation tools and design methodologies
Collaborate with Estimating, Procurement, Project Management, and Field teams to drive design optimization and execution success
Lead and mentor AutoCAD designers and junior engineers in producing site layouts, single-line diagrams, and construction drawings
Own and continuously improve the database of equipment and design standards used in BESS engineering
Direct development of construction details, engineering deliverables, and Bills of Materials for project work packages
Lead the design process from conceptual through Issued for Construction (IFC) stages across multiple projects
Review, interpret, and guide utility interconnection documentation including facility studies, interconnection agreements, and power purchase agreements
Apply advanced engineering and cost optimization strategies and maintain design matrices for scalability and future use
Provide technical leadership and support to Procurement and Operations teams during project execution
Utilize and promote company-approved tools and communication methods to ensure cross-functional alignment
Drive continuous improvement across engineering, procurement, scheduling, and project controls workflows
Analyze historical project data to inform design improvements, cost efficiencies, and material forecasting