Senior Project Engineer

We are Lightsource bp – and we’re on a mission to become a global leader in onshore renewables, anchored by our proven track record in solar development.
For over a decade we’ve been actively working to diversify the way our world is powered with sustainable and responsible renewable power. We work to safely deliver affordable, reliable, large-scale onshore renewable and energy storage solutions to help the world decarbonize.
Our growing business is constantly innovating and investing to help drive the energy transition. Our people and projects are focused on supporting long-term sustainable growth and energy security.
Lightsource bp was fully acquired by bp in 2024.

What You’ll do 
We are seeking a technically strong and commercially minded Senior Project Engineer to support utility scale photovoltaic (PV) + Battery Energy Storage System (BESS) projects. This hybrid role requires deep, hands on experience with both large scale PV and battery storage systems — including battery chemistries, BMS/EMS, power conversion systems (PCS), thermal systems, safety and certification standards, lifetime/degradation modelling, and commercial revenue stacking/dispatch strategies. The successful candidate will translate BESS and PV technical performance into procurement strategy, cost estimation, vendor evaluation, contractual requirements, and project finance diligence. Travel up to 25% required.  This is Not a fully remote role, position is hybrid and located in Austin, Denver, or San Francisco. 

Duties and Responsibilities
•    Establishing and managing technical requirements in contractual documents for Engineering, Project Management and Construction (EPC) engagements
•    Support the Construction team in EPC selection including contract negotiation
•    Assist the Project Management in the construction of a project in a timely manner by providing necessary engineering support
•    Complete design and submittal reviews and approvals as necessary for projects in development and construction
•    Manage Owner’s Engineering as assigned as necessary for Construction team support
•    Conduct site visits as necessary to support Construction team progress and milestone verification with lending parties and 3rd party independent engineers
•    Support the engagement of Independent Engineering firms selected for 3rd party financing of projects for execution
•    Provide technical diligence support for Project Finance
•    Support the business with critical lessons learned to ensure project budgets and expected returns are aligned with current market expectations
•    Develop task management tools to prioritize incoming technical requests from internal teams and provide regular deliverable updates
•    Represent your specialty area at relevant development meetings and delivery meetings as required by Lightsource bp
•    Represent your specialty during relevant third-party stakeholder meetings and events as required

Who we’re looking for   

Knowledge

•    Deep knowledge of BESS technologies and architectures, including battery chemistries (Li ion variants and alternatives), cell/module/pack/system design, BMS, PCS/inverter technologies, thermal management and fire mitigation strategies.
•    Strong understanding of BESS control/dispatch strategies, EMS, state of charge management, degradation/lifetime modelling and revenue stacking (capacity markets, frequency response, arbitrage, ancillary services).
•    Codes, standards and safety: experience with NFPA 855, UL 9540/9540A, IEEE 1547, IEC standards and local regulatory requirements for energy storage.
•    Practical experience integrating BESS with PV plants, substations, protection & control schemes and utility interconnection requirements.
•    Familiarity with project financing structures and independent engineering diligence focused on BESS risk areas (performance degradation, warranties, insurance, testing).
•    Knowledge of industry stakeholders (investors, TAs, EPCs, BESS OEMs, independent test labs) and supplier market trends for both PV and storage.
•    Ability to identify key technical risks from site documents and translate them into commercial mitigations in contracts and budgets.
•    EPC cost estimation skills that explicitly include BESS scopes and balance of systems impacts.

Qualifications 
•    Bachelor’s degree in Electrical Engineering (preferred) or equivalent technical degree.
•    CAD experience (AutoCAD, SketchUp, etc.) required.
•    Advanced knowledge of performance and storage modelling tools such as PVsyst, PVsol, StorageVAT, SAM, Matlab/Simulink or equivalent.
•    Demonstrated experience with BESS-specific modelling or vendor tools for lifetime, thermal and degradation analysis.
•    Willin