Director, Performance Engineering

About Us

Fullmark Energy is unlocking the potential of energy storage to accelerate renewables, enhance grid reliability, and benefit communities, financial investors, stakeholders, and partners. Founded in 2018, Fullmark Energy develops, builds, owns, and operates energy storage projects across the U.S. Fullmark Energy is securely backed by a fund managed by Infra Red Capital Partners, an infrastructure asset manager with $13 billion in equity under management.

Recognized as one of 2025’s Best Places to Work in the Power Industry by POWER magazine, with a four-gigawatt pipeline and a mix of projects operating and under construction, we are making the promise of energy storage a reality.

• $150,000 - $200,000 annual base salary, compensation commensurate with experience
• Performance-based annual bonus
• Excellent health insurance with 100% premium covered
• Pre-tax Dependent Care Benefit with employer contribution match
• 401k with employer match
• Commuter Benefit
• Competitive PTO and sick leave
• Family Leave Benefit

The Director of Performance Engineering will lead the strategy, development, and execution of performance monitoring, analysis, and optimization programs across Fullmark Energy’s operating BESS portfolio. This role is responsible for ensuring that every asset in the portfolio delivers against its contractual and financial obligations, driving continuous improvement through data-driven insights, advanced analytics, and close collaboration with Operations, Asset Management, and Commercial teams.

• Define and own the performance engineering strategy across the operating fleet, establishing KPIs, benchmarks, and performance frameworks aligned with contractual obligations and financial targets.
• Build and lead a high-performing team of performance engineers and analysts, setting clear roles, responsibilities, and development pathways.
• Develop and maintain performance models for BESS assets, including capacity degradation curves, round-trip efficiency benchmarks, auxiliary consumption baselines, and revenue optimization targets.
• Design and implement real-time and historical performance monitoring systems, leveraging SCADA, EMS, and data historian platforms to provide actionable fleet-wide visibility.
• Lead root cause analysis for underperformance events, coordinating with Operations, OEMs, and third-party vendors to drive timely resolution and prevent recurrence.
• Partner with Asset Management to deliver regular performance reporting to investors, lenders, and internal stakeholders, including variance analysis against modeled expectations.
• Collaborate with the Technical Services team to incorporate performance learnings into new project design standards, procurement specifications, and commissioning criteria.
• Oversee warranty and performance guarantee tracking, supporting commercial claims against OEMs and EPC contractors as required.
• Lead performance testing campaigns, including periodic capacity tests and acceptance tests, ensuring results are accurately documented and reconciled against model projections.
• Evaluate and implement new technologies, software tools, and methodologies to advance fleet performance analytics and predictive maintenance capabilities.
• Support due diligence activities for acquisitions and partnerships, assessing the historical and projected performance of target assets.
• Promote a culture of continuous improvement and data-driven decision-making across the organization, sharing insights and best practices cross-functionally.
• Ensure compliance with all applicable regulatory, contractual, and safety requirements governing asset performance and reporting.

• Bachelor’s or Master’s degree in Electrical Engineering, Systems Engineering, or a related technical discipline.
• 10+ years of experience in performance engineering, asset optimization, or technical operations within the energy, power, or renewable energy sectors.
• 5+ years of leadership experience managing technical teams.
• PE or PMP certification preferred.

• Proven experience with Battery Energy Storage Systems (BESS), including degradation modeling, capacity testing,…