Rondo Energy

Seismic Engineer

Join Rondo Energy in Madrid as a Seismic Engineer to support seismic analysis and design for innovative heat battery systems. This hybrid role offers private healthcare and equity compensation while contributing to impactful climate solutions.
Rondo Energy
Rondo Energy
Madrid, Spain Hybrid Full time UTC+02:00

Rondo Energy

Company Overview

Rondo Energy

Alameda, California, United States

2020

Employee count is not publicly specified, and as a private company, no revenue figures are disclosed; total funding raised is $82 million (source: cbinsights.com).

What They Do

Rondo Energy focuses on electrified thermal energy storage, specifically through its innovative Rondo Heat Battery (RHB) technology. This technology converts intermittent renewable electricity from sources such as wind and solar into high-temperature heat, which is stored in refractory bricks heated to temperatures between 1100-1500°C. The stored energy can then be dispatched as superheated air, process heat, steam, or power with an impressive efficiency of over 98% for extended periods, making it a viable solution for industries that require continuous high-temperature heat (source: rondo.com). Rondo's products are particularly targeted at sectors like steel, cement, chemicals, food processing, biofuels, textiles, and mining, where high-temperature heat is essential for operations. The company offers scalable systems ranging from pilot-scale deployments to larger commercial applications, catering to a diverse range of industrial needs (source: cbinsights.com). By providing a cost-effective alternative to lithium-ion batteries, Rondo differentiates itself in the market, focusing on thermal storage solutions that do not rely on rare materials, thus enhancing sustainability and accessibility for heavy industries globally (source: weforum.org).

Projects & Track Record

Rondo Energy has made significant strides in the deployment of its Heat Battery technology, with its first pilot-scale 2 MWh Heat Battery operational since 2023 at a California ethanol production facility. This deployment marks a pivotal moment for the company as it represents its initial major project in the field (source: canarymedia.com). The company has announced a total of 11 commercial developments, including 8 RHB deployments that collectively exceed 200 MWh. Notably, Rondo is working on a Heat-as-a-Service solution for HEINEKEN, which is powered by on-site solar and grid renewables, with support from major partners like EDP and the European Investment Bank (source: rondo.com). Rondo's partnerships span various industries, including food and beverage, cement production, mining, and textiles, with a total of 3 GWh in committed capacity across four major partnerships (source: rondo.com). The company's geographic presence is primarily in the United States, with its headquarters in Alameda and ongoing projects in California, while also expanding into Europe through its collaboration with HEINEKEN (source: cbinsights.com).

Recent Developments

In the past two years, Rondo Energy has successfully secured a Series B - II funding round, building on a previous $22 million Series A funding closed in February 2022. This funding was led by Breakthrough Energy Ventures and Energy Impact Partners, aimed at enhancing manufacturing capabilities and facilitating customer deliveries (source: rondo.com). The company has made headlines with its HEINEKEN Heat-as-a-Service contract, which was announced as a significant milestone in 2025, alongside the deployment of over 200 MWh across 11 commercial projects (source: rondo.com). Additionally, Rondo was granted a U.S. patent on February 25, 2025, for a thermal energy storage system that integrates with steam cracking systems, showcasing its commitment to innovation in energy storage and conversion technologies (source: cbinsights.com). While no acquisitions or mergers have been reported, Rondo continues to achieve operational milestones and gain recognition from investors for its efforts in addressing industrial heat challenges (source: canarymedia.com).

Working There

Rondo Energy's LinkedIn page indicates that the company is actively hiring for various roles primarily in engineering, manufacturing, project development, and operations. The departments include research and development focused on Heat Battery technology, sales teams targeting industrial clients, deployment teams for project execution, and support functions such as finance, reflecting the company's growth phase (source: linkedin.com). Most hiring efforts are concentrated at the Alameda headquarters, although there may be remote or project-based opportunities associated with U.S. pilots and European expansions like the HEINEKEN project (source: cbinsights.com). The company culture is characterized by a mission-driven approach to decarbonization, emphasizing collaboration with top investors and a commitment to scaling operations for profitability, as highlighted by CEO John O’Donnell in recent funding announcements (source: rondo.com). While specific employee benefits are not detailed in public sources, the venture-backed nature of Rondo suggests competitive compensation packages typical for Series B clean-tech firms in California, including potential equity options (source: linkedin.com).


Last updated on Feb 23, 2026 | Report an issue

We are seeking an experienced and innovative Seismic Engineer to join our growing team and help transform industrial heat at scale. This role offers the opportunity to work on a first-of-its-kind energy technology with tangible, real-world climate impact, supporting the development and deployment of large-scale hardware systems.

As part of the Structural Engineering team within the Product Engineering organization, you will support seismic analysis, design and qualification efforts across Rondo's Heat Battery System. You will work closely with structural, mechanical, process, electrical, controls, manufacturing, and project delivery teams to ensure designs are robust, code-compliant, constructible, and deployable across a wide range of seismic regions.

Your work will directly influence product reliability, project execution, permitting success, and the scalability of Rondo's technology platform.

Join us in reducing global CO₂ emissions by 1% in 10 years-and 15% in 15 years.

What You Will Do

Key responsibilities include, but are not limited to:

  • Perform Discrete Element Method (DEM) and Finite Element Method (FEM) analyses using appropriate tools and engineering methods.
  • Develop automated analysis workflows for DEM and FEM simulations, including model generation, data extraction, post-processing, visualization, and reporting.
  • Document engineering inputs, assumptions, methodologies, and analysis results, and communicate findings through clear, well-organized technical reports and presentations.
  • Develop and execute model validation and calibration plans using shake table testing data and experimental measurements.
  • Perform seismic hazard assessment and develop seismic design criteria and seismic calculation packages using applicable codes and standards across multiple geographies and regulatory jurisdictions internationally.
  • Evaluate seismic demand on various structural and mechanical systems, enclosures, equipment supports, ducting, and various mechanical and electrical interfaces and anchorage.
  • Contribute to an inclusive, collaborative, and iterative engineering environment that fosters open communication and continuous improvement.

What You Will Bring

  • Bachelor's degree in Civil or Mechanical Engineering, with a specialization in earthquake or seismic engineering.
  • 5+ years of experience in seismic engineering, structural dynamics, or earthquake engineering for industrial, energy, infrastructure, or mission-critical facilities.
  • Demonstrated experience using DEM and FEM tools such as 3DEC, SAP2000, and Ansys.
  • Proficiency in Python and/or MATLAB for data processing, automation, and development of custom computational tools to support seismic and dynamic system modeling.
  • Strong working knowledge of applicable seismic codes and standards such as ASCE, FEMA, and Eurocode.
  • Excellent communication skills, with the ability to gather, synthesize, document, communicate and present information across technical and non-technical stakeholders.
  • Flexibility, creativity, and a problem-solving mindset.
  • Ability to thrive in fast-paced, dynamic environments and work effectively in a cross-functional organization with mechanical, electrical, process engineering and supply chain teams.
  • Experience using CAD modeling such as SolidWorks, Autodesk Inventor and Navisworks.

Bonus Points

  • An advanced degree in Structural Engineering, Structural Mechanics, or Earthquake Engineering.
  • Experience with industrial process facilities, power generation, energy storage, petrochemical, mining, or heavy industrial projects.
  • Experience with performance-based seismic design methodologies for non-building structures and equipment.
  • Experience applying seismic qualification and design standards for industrial equipment and infrastructure, including relevant IEEE and IEC seismic qualification standards, with demonstrated ability to develop, execute, and review seismic analyses, validation programs, and equipment qualification methodologies.
  • Familiarity with international seismic codes and standards.
  • Experience with interface design between metal structures and concrete or refractory systems.
  • Experience with GD&T and tolerance analysis.
  • Experience working in a startup or rapidly scaling technology organization.
  • Professional Engineer (PE) license or ability to obtain PE licensure.

What We Offer

  • Private Healthcare (Alan Spain)

This role will be hybrid, and based in Madrid Spain.

This role would be eligible for Rondo's excellent benefits listed above plus additional compensation in the form of equity. Please note that some pay bands may have wide ranges of compensation to accommodate candidates' diverse sets of skill levels and experience.

Apply now

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About the role

July 8, 2026

July 8, 2026

Full time

Hybrid

Company

Energy Storage

Rondo Energy

rondo.energy

  •  Madrid, Spain

5+ years

UTC+02:00