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Principal Project Engineer

Energy VaultEngineering & Development
Hiring from
United States
Work type
Remote
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Our Company
Welcome to Energy Vault® (NYSE:NRGV), a global energy storage and power infrastructure company focused on owning, operating, and enabling resilient, dispatchable energy assets.
Energy Vault’s focus is to deliver reliable, flexible power that supports the evolving needs of modern grids, communities, and large energy users. Since 2024, the Company has centered its strategy on an Independent Power Producer (IPP) model, developing, building, owning, and operating critical energy assets around the world.
Energy Vault operates globally, with headquarters in Westlake Village, California and Lugano, Switzerland, and regional development across North America, Europe, Asia, and Australia. The Company partners with utilities, grid operators, and large energy consumers to deliver infrastructure that strengthens grid reliability, enables renewable integration, and supports long-term energy security.
By combining asset ownership with advanced technologies and integration expertise, Energy Vault is building the next generation of critical energy infrastructure, delivering dependable power when and where it matters most.
Learn more at www.energyvault.com, explore recent updates in our Newsroom, and connect with us on LinkedIn, X, Facebook, Instagram, Vimeo, or YouTube.
Our Values
We Commit: To Building a Better Future for Earth and All Its Beings.
We Innovate: Cutting Edge Solutions to Accelerate the Unique Energy Aspirations of Our Clients.
We Connect: To Build Genuine Relationships.
We Deliver: Going Above & Beyond by Being Fast & Nimble.
We Lead: With Authenticity and Purpose.

Your Impact as a Principal Project Engineer:

We seek an experienced Principal Project Engineer, BESS Projects, to own the engineering strategy, design optimization, and technical execution of Energy Vault BESS (Battery Energy Storage System) projects. In this role, you will serve as the senior technical authority across multiple concurrent projects, partnering with project managers, construction managers, customers, outside vendors, AHJs, and consultants. You will bring strong electrical and substation engineering depth to the team, ensuring MV/HV interconnection, protection, and balance-of-plant designs are technically sound, constructible, and optimized. As we rapidly grow and deliver on more contracts worldwide, you will define and scale the processes, standards, technology, and products that drive repeatable project success. Energy Vault operates as both an independent power producer (IPP) and an integrator for customer projects.

Your Mission:

  • Own end-to-end technical execution across a portfolio of BESS projects, ensuring scope, schedule, and stakeholders remain aligned from development through commissioning and turnover.

  • Proactively identify gaps in scope, responsibility, and interfaces across the engineering, procurement, construction, and permitting process; drive resolution with stakeholders to protect project success.

  • Serve as the technical authority on complex project issues, applying engineering principles and engaging subject matter experts to drive sound, timely solutions.

  • Define equipment specification standards and lead the specification, technical evaluation, and selection of major equipment, including transformers, switchgear, and protection solutions.

  • Act as the primary technical interface with internal (project managers, product engineers, sales team) and external stakeholders (utilities, AHJs, EPC contractors, end customers), representing Energy Vault in critical technical discussions.

  • Lead the review and approval of project design documents, including single line drawings, communication diagrams, layouts, and equipment test reports; maintain design configuration control.

  • Review and assess electrical designs for BESS projects, covering MV/HV substation design, switchgear, transformers, protection systems, grounding, and balance of plant.

  • Direct and review electrical system studies, including load flow, short circuit, protective relay coordination, arc flash, grounding, and cable sizing; ensure designs meet utility interconnection requirements and applicable IEEE/ANSI, IEC, and NEC standards.

  • Plan, direct, and oversee BESS project commissioning across multiple sites.

  • Provide technical input to proposals and early-stage project development, including design approach, cost, and technical risk.

  • Establish and continuously improve engineering processes, standards, and lessons-learned practices; provide strategic feedback to shape internal processes and product.

  • Mentor and provide technical guidance to project engineers across the team, strengthening the team's electrical and substation engineering capability.

Your Background:

  • 12+ years of experience with a Bachelor’s degree in an electrical or power systems engineering program, or 10+ years of experience with a Master’s degree in the same programs.

  • Proven track record leading project design and technical execution, preferably in the building of large power stations or PV or other utility-scale power projects

  • Strong electrical engineering background with hands-on experience in MV/HV substation design and engineering, including switchgear, power transformers, protection and control, and grounding

  • Experience performing or overseeing power system studies (load flow, short circuit, relay coordination, arc flash, grounding) using tools such as ETAP, SKM PowerTools, or CDEGS

  • Background with a utility, engineering consultancy, or EPC firm in substation or utility-scale generation design is a strong plus

  • 7+ years of BESS project experience, preferred

  • 5+ years of experience working on EPC projects

  • Demonstrated experience serving as technical lead across multiple concurrent projects and mentoring engineers

  • PE certification or equivalent, preferred

  • Strong working knowledge of permitting processes with local authorities

  • Proficient in Microsoft Office tools (Excel, Word, PowerPoint)

  • Willingness to travel domestically and internationally, up to 30%

  • Comfortable in fast-paced, rapid growth environments

  • A passion for sustainability, our mission, and our vision is a bonus!

Benefits of Powering the Future with Energy Vault:

  • Annual bonus plan.
  • Restricted Stock Units (RSUs).
  • 401K employer matching.
  • Comprehensive medical, dental, and vision plans for employees and family.
  • Flexible Spending Account.
  • Company-paid Life insurance, Short- and Long-term disability insurance.
  • 8-weeks for Paternity leave.
  • Generous holiday allowance.
  • Flexible time off plus sick leave.
  • Reimbursement for home office equipment, phone, and internet expenses.

    • Join Us in Empowering Change

    At Energy Vault we are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants. We believe inclusion creates opportunity for collaborative excellence through diversity of thought. We invite individuals of all genders, races, identities, ethnicities, sexual orientations, national origins, abilities, protected veteran status, religions, educational and socioeconomic backgrounds to explore employment with our organization.

    Apply now and become a catalyst for change at Energy Vault!

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