Title: Lead Cost Estimator Location: Toronto, ON – Hybrid (3+ days/week in office) Job Type: Full-Time Travel Requirement: Position Type: Net New Hydrostor, a leading energy storage, technology and infrastructure company dedicated to developing utility‑scale, long‑duration energy storage solutions, is seeking a Lead Cost Estimator to join our team in Toronto, ON. Hydrostor is seeking a Lead Cost Estimator to join our Technology team. In this senior individual contributor role, you’ll build and scale an integrated estimating capability spanning product development, technology evolution, and project execution.

Reporting to the VP, Project Engineering, you will partner across Engineering, Product, Strategic Sourcing, and Early Development to deliver clear, decision‑grade capital cost estimates. You’ll combine standardized product costs with site‑specific scope, execution strategies, and regional dynamics to guide critical business decisions. You’ll play a key role in early‑stage project development, ensuring estimates inform investment decisions and shape supply chain strategy.

This includes translating current, future, and emerging (R&D; and new site) technologies into cost insights that drive product evolution and deployment. Your work will directly support project development and execution readiness across North America and Australia—ensuring our innovations translate into lasting cost competitiveness and scalable supply chain outcomes. Develop and maintain Hydrostor’s baseline product cost model, including direct CAPEX, indirect costs, EPC/M services, escalation, and risk and contingency Define clear boundaries between standard product scope and site‑specific scope, including assumptions, exclusions, and interfaces Establish estimating structures aligned with AACE Guidelines and general project accounting and auditing standards, including application of WBS, CBS and cost account frameworks for consistent reporting and benchmarking Create standardized dashboards and executive reports to support company‑wide visibility and senior leadership decision‑making Partner with Engineering, Product, and Project teams to ensure alignment with approved configuration baselines Ensure estimates are structured to inform downstream project engineering, execution planning, and supply chain strategies Build and maintain parametric estimating models, cost curves, unit rates, and historical cost databases Integrate lessons learned and actual project data into estimating tools and future cost models Develop forward‑looking cost estimates for current, near‑term,



and future technology iterations, including hypothetical R&D; pathways and recent site applications Own End‑to‑End Project Estimating Develop estimates across all project stages, from conceptual and screening through budget and detailed EPC‑level estimates Perform quantity takeoffs, equipment and material pricing, labour productivity analysis, and indirect cost development Evaluate and incorporate supplier and subcontractor quotations into estimates Prepare comprehensive Basis of Estimate (BoE) documentation capturing scope, assumptions, methodology, and risk approach Provide estimating support to project engineering and early‑stage development activities, ensuring cost alignment with project scope and maturity Apply country and regional adjustment factors to baseline estimates, including labour rates, logistics, procurement strategies, and site conditions to provide early cost insights and benchmarks Partner closely with Strategic Sourcing to incorporate supplier intelligence, negotiated pricing, and supply chain constraints/opportunities Ensure estimates reflect and inform supply chain strategy, including long‑lead items, vendor selection, and procurement approaches Support scenario analysis comparing baseline product cost with site‑specific execution strategies Drive Estimating Governance & Continuous Improvement Lead preparation of Basis of Estimate documentation with full traceability of assumptions Support risk identification, contingency development, and value engineering efforts Ensure alignment with configuration management, change control, and baseline updates Contribute to continuous improvement of estimating standards, tools, and governance practices Strengthen the integration between estimating outputs and project, product, and supply chain decision‑making processes You’re a seasoned cost estimating professional with deep experience in large‑scale industrial or energy projects, combining technical rigour with strong commercial insight.

You can translate engineering scope, supply chain dynamics, and evolving technologies into credible cost positions that inform investment decisions. You thrive in cross‑functional environments,



influencing teams across Engineering, Product, Sourcing, and Project Development. You’re equally comfortable building parametric models for early‑stage, emerging technologies as you are developing detailed EPC estimates for execution.

You bring experience with first‑of‑a‑kind or new technology deployments and can confidently model cost uncertainty across varying levels of maturity. 10+ years’ experience in cost estimating, cost engineering, or project controls on large capital projects ~ Bachelor’s degree in Engineering, Construction Management, Finance, or related field ~ Strong knowledge of AACE estimating practices, classification frameworks, and quantitative risk assessment ~ Experience in energy, oil & gas, LNG, power generation, mining, infrastructure, or similar industries ~ Deep understanding of cost structures, productivity, construction methods, contingency, escalation, and risk ~ Ability to interpret engineering drawings, specs, PFDs, P&IDs;, and technical documentation ~ Experience working cross‑functionally across engineering, procurement, product, and project teams ~ Experience supporting project engineering, early development, and investment decision‑making ~ Ability to translate estimates into supply chain insights, including vendor engagement and procurement planning ~ Experience with configuration management, BOMs, or product structures ~ Experience building/maintaining parametric models, cost databases, and benchmarking tools ~ Experience supporting proposals, commercial evaluations, and/or investor/lender due diligence ~ Discretionary Bonus ~ Paid Vacation Time ~ Medical, Dental and Vision Benefits ~ At Hydrostor, we know that fostering an inclusive workplace, which values diversity, inclusion, and belonging is paramount to our success. Hydrostor proudly embraces the principles of equal opportunity and inclusion. We ensure that all qualified applicants are considered for employment without regard to race, creed, colour, religion, gender, gender identity, gender expression, age, sexual orientation, national origin, marital status, parental, pregnancy, citizenship status, veteran status, disability, or any other protected status protected by applicable law.

Hydrostor is committed to making our application and interview process accessible to everyone, and we encourage applications from people with disabilities. Use of Artificial Intelligence Hydrostor does not use Artificial Intelligence (AI) tools to screen, assess, or select candidates during the recruitment or interview process. #

📌 Lead Project Cost Estimator (Toronto)
🏢 ArcTern Ventures
📍 Toronto