GridStor Names Spencer Mash as Senior Vice President to Advance Financing of Battery Storage Projects

New SVP and Head of Capital Markets to lead financing for 3+ GW of energy storage to supply utilities, data centers, and power retailers

PORTLAND, Ore.--(BUSINESS WIRE)-- GridStor, a Goldman Sachs Asset Management-backed developer and operator of utility-scale battery energy storage systems, announced today that Spencer Mash has been hired as the company’s Senior Vice President of Finance and Head of Capital Markets. Mash brings more than 20 years of experience in capital management to the GridStor executive team, including more than a decade of renewable energy finance focused on distributed generation and utility-scale solar and wind projects across the United States. Prior to joining GridStor, most recently Mash co-founded and served as Executive Vice President of Greenbacker Renewable Energy Company, an investment manager and independent power producer responsible for 3.5 gigawatts of clean energy capacity and more than $3.4 billion in assets under management.

“Spencer brings decades of project investment expertise and entrepreneurial know-how to GridStor at a key turning point in our corporate growth,” said Frank Burkhartsmeyer, GridStor’s CFO. “We are expanding our project pipeline and senior leadership team to capitalize on the immense opportunity we see to support large power users in emerging industries, and Spencer’s experience is an essential component to successfully executing our goals.”

As SVP of Finance, Mash will lead financing transactions to support the company’s portfolio of more than 3 GW of battery energy storage projects in later-stage development, under construction, and already operating. As Head of Capital Markets, Mash will negotiate and structure diverse capital solutions, manage relationships with lenders and investors, and ensure rigorous due diligence processes.

“I’m thrilled to be joining GridStor as we take the next step in building out large-scale battery storage,” said Mash. “The company has already proven it can deliver, earning the confidence of leading financial partners, and with the support of Goldman Sachs Asset Management we’re well positioned to capitalize on the opportunity ahead. GridStor’s disciplined execution and strong team culture set it apart, and I’m looking forward to building on that foundation.”

Mash’s prior roles include serving as Vice President at Deerfield Capital Management, where he performed due diligence and financial analyses, negotiated loan documentation, and monitored private middle-market first lien, second lien, mezzanine, and one-stop senior secured debt investments. He began his career in the Leveraged Acquisition Finance group at Bank of America Merrill Lynch. Mash graduated magna cum laude from the University of Pennsylvania’s Wharton School of Business with a BS in Economics and a concentration in Finance and Marketing.

About GridStor

GridStor strengthens America’s power system reliability by building and operating battery projects, storing electricity to deliver when and where it’s most needed. GridStor develops, acquires, and operates utility-scale, standalone battery storage projects primarily across North America. Visit us at www.gridstor.com and on LinkedIn.

About Goldman Sachs Asset Management

Goldman Sachs (NYSE: GS) is one of the leading investors in alternatives globally, with over $500 billion in assets and more than 30 years of experience. The business invests in the full spectrum of alternatives including private equity, growth equity, private credit, real estate, infrastructure, sustainability, and hedge funds. Clients access these solutions through direct strategies, customized partnerships, and open-architecture programs.

The business is driven by a focus on partnership and shared success with its clients, seeking to deliver long-term investment performance drawing on its global network and deep expertise across industries and markets.

The alternative investments platform is part of Goldman Sachs Asset Management, which delivers investment and advisory services across public and private markets for the world’s leading institutions, financial advisors and individuals. Goldman Sachs has approximately $3.3 trillion in assets under supervision globally as of June 30, 2025.

Established in 2006, Infrastructure at Goldman Sachs Alternatives has consistently navigated the evolving infrastructure asset class, having invested approximately $13 billion in infrastructure assets across market cycles since its inception. The business partners with experienced operators and management teams across multiple sectors, including digital infrastructure, energy transition, transportation and logistics and essential services.

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Media Contact

Alaina Gjertsen

alaina.gjertsen@gridstor.com

Source: GridStor