Eos Energy Enterprises Executive and Leadership Team

July, 2026

Leadership Overview

Eos Energy Enterprises has 4 executives leading key functions including strategy, technology, operations, and legal affairs.

Driven by positively ingenious solutions, Eos Energy Enterprises accelerates the shift to clean energy, transforming global power storage with its breakthrough Znyth aqueous zinc battery technology.

Leadership Roles at Eos Energy Enterprises

  • Chief Executive Officer - Joseph Mastrangelo
  • Chief Operating Officer - John Mahaz
  • Chief Technology Officer - Francis Richey
  • Chief Legal Officer - Marie Martin
  • Joseph Mastrangelo - Chief Executive Officer

    Joseph Mastrangelo, the Chief Executive Officer at Eos Energy Enterprises, directs the company's overall strategy and market positioning. Mastrangelo guides the organization's mission to accelerate the shift to clean energy through innovative power storage solutions. Overseeing global operations, the Chief Executive Officer ensures alignment with corporate targets for scaling the Znyth aqueous zinc battery technology. This leadership role involves expanding market share through strategic partnerships and product development. By optimizing the company's go-to-market approach, Joseph Mastrangelo directly impacts Eos Energy Enterprises' growth and financial stability. Ultimately, Mastrangelo secures long-term viability for the company's sustainable energy storage systems.

    John Mahaz - Chief Operating Officer

    John Mahaz, the Chief Operating Officer at Eos Energy Enterprises, executes the company's manufacturing and operational strategies. Mahaz oversees the efficient production of the Znyth aqueous zinc battery and associated energy storage systems, ensuring U.S.-based manufacturing standards are met. Directing supply chain logistics and operational scaling, the Chief Operating Officer guarantees product availability and quality for diverse customer applications. This position involves optimizing production processes to enhance efficiency and reduce costs, directly supporting the company's mission to provide a reliable energy storage alternative. By managing day-to-day operations, John Mahaz ensures Eos Energy Enterprises can meet market demand and deliver on its promise of positively ingenious clean energy solutions.
    John Mahaz

    Francis Richey - Chief Technology Officer

    Francis Richey, the Chief Technology Officer at Eos Energy Enterprises, architects the company's technological vision and product innovation. Richey spearheads the development and refinement of the breakthrough Znyth aqueous zinc battery, ensuring its superiority over conventional lithium-ion technology. Overseeing research and development, the Chief Technology Officer drives advancements in battery safety, scalability, efficiency, and sustainability. This critical role involves translating complex scientific principles into commercially viable energy storage solutions for utility, industrial, commercial, and residential customers. By fostering a culture of continuous improvement, Francis Richey ensures Eos Energy Enterprises remains at the forefront of energy storage technology, delivering reliable 3- to 12-hour applications.
    Marie Martin, the Chief Legal Officer at Eos Energy Enterprises, provides strategic counsel on all legal and compliance matters. Martin safeguards the company's intellectual property, including the innovative Znyth aqueous zinc battery technology, and ensures adherence to regulatory frameworks governing energy storage and manufacturing. Overseeing corporate governance and risk management, the Chief Legal Officer supports the company's expansion into new markets and customer segments. This role is crucial for navigating the complexities of U.S. manufacturing and clean energy initiatives. By managing legal affairs, Marie Martin enables Eos Energy Enterprises to operate with integrity and confidence, facilitating its mission to transform how the world stores power.
    Marie Martin

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    Frequently Asked Questions Regarding Eos Energy Enterprises Top Executives and Leadership Team

    Who leads Eos Energy Enterprises?
    Eos Energy Enterprises is led by Joseph Mastrangelo (Chief Executive Officer), along with executives such as John Mahaz (Chief Operating Officer) and Francis Richey (Chief Technology Officer).
    Who is part of Eos Energy Enterprises’s executive team?
    The executive team of Eos Energy Enterprises includes leaders such as Joseph Mastrangelo (Chief Executive Officer), John Mahaz (Chief Operating Officer), Francis Richey (Chief Technology Officer) and other senior executives.
    How many executives does Eos Energy Enterprises have?
    Eos Energy Enterprises has 4 executives leading key business areas.
    What roles are included in Eos Energy Enterprises’s leadership team?
    The leadership team of Eos Energy Enterprises includes roles such as Chief Executive Officer, Chief Operating Officer, Chief Technology Officer, Chief Legal Officer.