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Flatiron Energy, a Hull Street Energy portfolio company, is focused on developing, building, and operating standalone energy storage assets in New York, New England, and the Mid-Atlantic that integrate renewable energy onto the grid, replace fossil fuel plants, and increase grid reliability. Created by a team of experienced energy storage veterans, Flatiron Energy is creating the critical infrastructure needed to achieve electric reliability and meet climate goals.  The leadership team has deep experience developing, structuring, financing, and owning and operating energy storage assets in wholesale markets. Flatiron Energy is a growing company with a dynamic, fast-paced, creative, and dedicated culture. The right candidate will be excited to help advance the company and improve Development team operations.  The Flatiron team is also passionate about ensuring that projects have an equitable impact on surrounding communities. Flatiron is looking for candidates who resonate with the company mission.  Flatiron Energy is seeking a highly experienced and commercially driven Vice President of Transmission to lead the company’s interconnection strategy and function across Flatiron’s utility-scale standalone battery storage portfolio. This executive will oversee all transmission planning and interconnection activities across ISO-NE, NYISO, and PJM. The role will directly manage a growing transmission and interconnection team, including two senior transmission managers, and serve as a key strategic partner to Development, Commercial, Operations, Finance, and Executive Leadership. The ideal candidate brings deep technical expertise, strong commercial instincts, proven leadership capability, and extensive experience navigating and negotiating complex interconnection and transmission processes for transmission-connected energy storage and renewable energy projects. Key Responsibilities: Leadership & Strategy Lead Flatiron’s transmission function across all development markets and projects. Develop and execute portfolio-wide interconnection and transmission strategies that maximize project value, reduce schedule risk, and improve probability of successful commercialization. Manage, mentor, and develop a high-performing team of transmission professionals. Serve as a senior internal advisor to Executive Leadership on transmission constraints, queue positioning, congestion dynamics, deliverability, upgrade exposure, interconnection refundability, and evolving market rules. Support corporate growth initiatives, including greenfield development, acquisitions, joint ventures, and market expansion. Interconnection Management Oversee all aspects of the interconnection lifecycle across PJM, NYISO, and ISO-NE, including application strategy, feasibility assessments, system impact studies, facilities studies, cost allocation, milestone compliance, and queue management. Understand interconnection processes, timelines, and tariff structures across Flatiron’s core markets (e.g. PJM, NYISO, ISO‑NE), and advise on optimal connection strategy using queue and hosting capacity data. Direct engagement with ISOs/RTOs, transmission owners, utilities, consultants, and regulatory stakeholders to advance projects efficiently and proactively resolve issues. Drive strategy around withdrawal risk, cluster study exposure, restudies, and transmission upgrade mitigation. Evaluate and optimize points of interconnection, queue positioning, deliverability pathways, and commercial transmission opportunities. Lead negotiations related to interconnection agreements, study assumptions, transmission service, and related commercial arrangements. Manage the portfolio of interconnection studies and application milestones; maintain timelines, reporting, and stakeholder coordination. Provide interco