Rejobs
Rondo Energy

Operations Supervisor

Join Rondo Energy in Madrid as an Operations Supervisor overseeing Heat Battery fleet performance and safety. This role involves hands-on problem-solving, data analysis, and international collaboration. Enjoy private healthcare and life insurance benefits while supporting cutting-edge renewable energy technology.
Rondo Energy
Rondo Energy
Madrid, Spain On-site Full time UTC+01:00

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

As Operations Supervisor, you will directly support operations of the Rondo Heat Battery fleet ensuring safety and performance expectations are met. You will develop a strong understanding of the core technology and its operating philosophy to serve as a key technical reference for both host site operators and other Rondo teams. This position requires a hands-on approach to problem-solving, a strong analytical mindset, and the ability to collaborate with diverse teams, including those in different time zones. As the Rondo fleet spans across several continents, candidates must have flexibility to work across multiple time zones and travel internationally as required.

What You Will Do

(key responsibilities for this role include but are not limited to):

  • Operations Supervision: You will support the remote monitoring of operating units and analyze data trends to identify potential issues and improvements. You will be primary point of contact with the site operators and facilitate day-to-day implementation of operating plans.
  • Commissioning, Outage, and Restart Support: You will provide critical support during project commissioning, outages, and restarts, ensuring a smooth transition from commissioning to full operational handoff as well as the implementation and commissioning of any product improvement retrofits.
  • Database & System Management: You will maintain key operational databases. Including:
    • Incident database to track, investigate, and resolve all operational incidents.
    • Reliability database to track and prioritize our top threats and vulnerabilities.
    • Lessons learned worklist where ideas for control or design improvements are tracked and developed with the Engineering team to inform design changes or improvement retrofits.
  • Troubleshooting & Process Safety Management: You will provide rapid troubleshooting support for incidents that may emerge in the field. Your field experience will be critical in supporting Root Cause Analyses and HAZOPs in close collaboration with internal safety, quality and engineering disciplines to identify root causes and implement lasting solutions.
  • Performance Tracking: You will support the regular tracking and reporting of operational KPIs to management/customers on a weekly basis to communicate units' technical and commercial status relative.

What You Will Bring

  • 3+ years' experience in operations
  • Bachelor's or master's degree in an engineering discipline
  • Experience in operations of utility scale CSP, waste heat/biomass plants, conventional steam power plants, or battery storage
  • Experience in operations of industrial-scale water/steam or air circulation systems
  • Industrial process design and control (P&IDs, Control Narrative)

Bonus Points!

  • Process Safety Management (e.g. HAZOP, RCA)
  • Thermodynamic course work with heat & mass balance and heat transfer modelling experience

What We Offer

  • Private Healthcare (Alan Spain) and Life Insurance (Allianz)

This role is preferred to be on-site Madrid, Spain. Please note that some pay bands may have wide ranges of compensation to accommodate candidates' diverse sets of skill levels, experience, and geographic locations.

Apply now

Job expired?

Please let Rondo Energy know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!

About the role

March 22, 2026

Full time

Company

March 22, 2026

On-site

Bioenergy , Energy Storage

Rondo Energy

rondo.energy

  •  Madrid, Spain

3+ years

UTC+01:00