Create, maintain, and improve in-house engineering tools for PV performance modeling, ESS dispatch modeling, cost estimation, and optimization for existing and new markets; Provide training and support on performance modeling software, estimation tools and optimization across the organization, enabling engineers to work independently; Understand project developer and project finance requirements of design, performance modeling, pricing, and valuation at different stages of development, and identify how scope management and other approaches can be deployed to reduce lead time. Apply technical knowledge to optimize designs for various metrics such as specific yield, capacity, project costs, levelized cost of energy and direct profit; Establish and maintain templates for EPC cost estimates for distributed and utility-scale renewable energy (PV, ESS & wind) projects; Perform EPC pricing model reviews and ensure alignment with market trends; Collaborate with product teams to ensure optimization results utilize equipment informed by their research and buyer preferences.