We are seeking a driven and innovative Senior Mechanical Design Engineer to lead the design and development of Rondo’s proprietary heat battery systems. In this role, you’ll design critical systems, components, and tooling that will enable the large-scale deployment of RHBs across global industrial processes.  Your work will directly shape the systems that can replace fossil-fired boilers worldwide and contribute to one of the most significant industrial transformations in history.  Join our team and together we can reduce world CO₂ emissions by 10% in 10 years, and by 15% in 15 years!   What You’ll Do <ul><li>Translate product and subsystem requirements into technical specifications, conceptual designs, and detailed mechanical solutions. </li></ul><ul><li>Execute engineering analyses (thermal, mechanical, fluid/mass flow, structural) using 1D and 3D tools. </li></ul><ul><li>Conduct prototyping, testing, data analysis, and risk assessments (e.g., DFMEA-style evaluations). </li></ul><ul><li>Design components and assemblies for manufacturability, scalability, reliability, cost-effectiveness, and field performance. </li></ul><ul><li>Prepare engineering drawings, specifications, and documentation using CAD/PLM (SolidWorks preferred). </li></ul><ul><li>Develop and improve processes for high-volume manufacturing; establish quality and inspection criteria in partnership with operations. </li></ul><ul><li>Support development of tooling, fixtures, and equipment required for manufacturing, integration, and testing. </li></ul><ul><li>Collaborate across engineering, product, and operations teams to drive rapid iteration and resolve technical issues. </li></ul><ul><li>Define technical requirements for vendors and assist with supplier qualification. </li></ul><ul><li>Contribute to cost models and cost-reduction initiatives through material, process, and design optimization. </li></ul><ul><li>Participate in design reviews and present engineering rationale, data, and options. </li></ul> What You’ll Bring <ul><li>5+ years of mechanical engineering experience across relevant industries; high-temperature or energy systems experience is a plus. </li></ul><ul><li>Bachelor’s or Master’s degree in Mechanical Engineering or related discipline. </li></ul><ul><li>Proven ability to design and deliver hardware through full development cycles—from requirements to production release. </li></ul><ul><li>Hands-on experience with prototyping, testing, failure analysis, and iterative design. </li></ul><ul><li>Ability to perform engineering analyses (1D or 3D) across heat transfer, mass flow, structural mechanics, or related areas. </li></ul><ul><li>Fluency with SolidWorks and CAD best practices; familiarity with GD&amp;T and tolerance stack-ups. </li></ul><ul><li>Strong problem-solving skills, creativity, and a track record of innovation. </li></ul><ul><li>Excellent communication and collaboration skills; thrives in fast-paced, cross-functional environments. </li></ul>What We Offer:<ul><li>Comprehensive Medical Benefits</li><li>Dental &amp; Vision Benefits</li><li>Life Insurance and ADD</li><li>Up to 13 paid holidays per year, in addition to a company week-long holiday in December</li><li>Flexible time off policy</li><li>Catered lunches on-site</li><li>401(k) plan with company match</li><li>Rondo HQ is close to Oakland airport - one block from the Bay - and has stunning Bay views!</li></ul>This role is on-site, and necessitates being present at our Alameda HQ 4-5 days per week. The estimated annual salary range for this role is $150,000 to $180,000 and it 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.  About the Company  We are transforming industrial decarbonization with our innovative Rondo Heat Battery technology. Rondo is deploying low-cost, zero-carbon Rondo Heat Batteries to accelerate the deployment of renewable energy and to significantly decarbonize industrial processes that are commonly thought of as "difficult-to-decarbonize". Our heat batteries charge from intermittent renewables to provide high temperature, continuous heat for customers safely, reliably, at an unprecedented 98% efficiency - and at a cost point that is lower than any other method.  Our technology is designed to replace fossil-fired boilers. By enabling industries to adopt renewable energy without costly factory changes, we are accelerating the transition to a sustainable future. With over $160 million in funding and partnerships across critical industrial sectors, Rondo is scaling rapidly to meet global demand. Rondo Energy is an equal opportunity employer. We strive to create a supportive and inclusive workplace where contributions are valued and celebrated, and our employees thrive by being themselves and are inspired to do their best work. We seek applicants of all backgrounds and identities, across race, color, ethnicity, national origin or ancestry, citizenship, religion, sex, sexual orientation, gender identity or expression, veteran status, marital status, pregnancy or parental status, or disability. Applicants will not be discriminated against based on these or other protected categories or social identities.Rondo is committed to the full inclusion of all applicants. If reasonable accommodation is needed to participate in the interview process, please let our recruiting team know.We proactively work to design hiring processes that promote equity and inclusion while mitigating bias.Note to Recruitment Agencies: Rondo does not accept unsolicited agency resumes. Furthermore, Rondo Energy does not pay placement fees for candidates submitted by any agency other than its approved partners.

Rondo Energy's mission is to eliminate 15% of global CO2 emissions in 15 years.&nbsp;
To accomplish this mission, Rondo is deploying low-cost, zero-carbon Rondo Heat Batteries&nbsp;to accelerate the deployment of renewable energy and to significantly decarbonize industrial processes that are commonly thought of as "difficult-to-decarbonize". The Heat Batteries are&nbsp;charged from intermittent renewables to&nbsp;provide high temperature, continuous heat for customers safely, reliably, at an unprecedented 98% efficiency, and at a cost point that is lower than any other method.

Senior Mechanical Engineer

We are&nbsp;seeking&nbsp;a driven and innovative Senior Mechanical Design Engineer to lead the design and development of Rondo’s proprietary heat battery systems. In this role,&nbsp;you’ll&nbsp;design critical systems, components, and&nbsp;tooling&nbsp;that will enable the large-scale deployment of RHBs across global industrial processes. &nbsp;Your work will directly shape the systems that can replace fossil-fired boilers worldwide and contribute to one of the most significant industrial transformations in history. &nbsp;Join our team and together we can reduce world CO₂ emissions by 10% in 10 years, and by 15% in 15 years! &nbsp;&nbsp;What&nbsp;You’ll&nbsp;Do&nbsp;<ul><li>Translate product and subsystem requirements into technical specifications, conceptual designs, and detailed mechanical solutions.&nbsp;</li></ul><ul><li>Execute engineering analyses (thermal, mechanical, fluid/mass flow, structural) using 1D and 3D tools.&nbsp;</li></ul><ul><li>Conduct prototyping, testing, data analysis, and risk assessments (e.g., DFMEA-style evaluations).&nbsp;</li></ul><ul><li>Design components and assemblies for manufacturability, scalability, reliability, cost-effectiveness, and field performance.&nbsp;</li></ul><ul><li>Prepare engineering drawings, specifications, and documentation using CAD/PLM (SolidWorks preferred).&nbsp;</li></ul><ul><li>Develop and improve processes for high-volume manufacturing;&nbsp;establish&nbsp;quality and inspection criteria in partnership with operations.&nbsp;</li></ul><ul><li>Support development of tooling, fixtures, and equipment&nbsp;required&nbsp;for manufacturing, integration, and testing.&nbsp;</li></ul><ul><li>Collaborate&nbsp;across&nbsp;engineering, product, and operations teams to drive rapid iteration and resolve technical issues.&nbsp;</li></ul><ul><li>Define technical requirements for vendors and&nbsp;assist&nbsp;with supplier&nbsp;qualification.&nbsp;</li></ul><ul><li>Contribute to&nbsp;cost models and cost-reduction initiatives through material, process, and design optimization.&nbsp;</li></ul><ul><li>Participate in design reviews and present engineering rationale, data, and options.&nbsp;</li></ul>&nbsp;What&nbsp;You’ll&nbsp;Bring&nbsp;<ul><li>5+ years of mechanical engineering experience across relevant industries; high-temperature or energy systems experience is a plus.&nbsp;</li></ul><ul><li>Bachelor’s or&nbsp;Master’s degree in Mechanical Engineering&nbsp;or related discipline.&nbsp;</li></ul><ul><li>Proven ability to design and deliver hardware through full development cycles—from requirements to production release.&nbsp;</li></ul><ul><li>Hands-on experience with prototyping, testing, failure analysis, and iterative design.&nbsp;</li></ul><ul><li>Ability to perform engineering analyses (1D or 3D) across heat transfer, mass flow, structural mechanics, or related areas.&nbsp;</li></ul><ul><li>Fluency with SolidWorks and CAD best practices; familiarity with GD&amp;T and tolerance stack-ups.&nbsp;</li></ul><ul><li>Strong problem-solving skills, creativity, and&nbsp;a track record&nbsp;of innovation.&nbsp;</li></ul><ul><li>Excellent communication and collaboration skills;&nbsp;thrives&nbsp;in fast-paced, cross-functional environments.&nbsp;</li></ul>What We Offer:<ul><li>Comprehensive Medical Benefits</li><li>Dental &amp; Vision Benefits</li><li>Life Insurance and ADD</li><li>Up to 13 paid holidays per year, in addition to a company week-long holiday in December</li><li>Flexible time off policy</li><li>Catered lunches on-site</li><li>401(k) plan with company match</li><li>Rondo HQ is close to Oakland airport - one block from the Bay - and has stunning Bay views!</li></ul>This role is on-site, and necessitates being present at our Alameda HQ 4-5 days per week. The estimated annual salary range for this role is $150,000 to $180,000 and it 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.&nbsp;&nbsp;About the Company &nbsp;We are transforming industrial decarbonization with our innovative Rondo Heat Battery technology. Rondo is deploying low-cost, zero-carbon Rondo Heat Batteries to accelerate the deployment of renewable energy and to significantly decarbonize industrial processes that are commonly thought of as "difficult-to-decarbonize". Our heat batteries charge from intermittent renewables to provide high temperature, continuous heat for customers safely, reliably, at an unprecedented 98% efficiency - and at a cost point that is lower than any other method.&nbsp;&nbsp;Our technology is designed to replace fossil-fired boilers. By enabling industries to adopt renewable energy without costly factory changes, we are accelerating the transition to a sustainable future. With over $160 million in funding and partnerships across critical industrial sectors, Rondo is scaling rapidly to meet global demand.&nbsp;Rondo Energy&nbsp;is an equal opportunity employer. We strive to create a supportive and inclusive workplace where contributions are valued and celebrated, and our employees thrive by being themselves and are inspired to do their best work. We seek applicants of all backgrounds and identities, across race, color, ethnicity, national origin or ancestry, citizenship, religion, sex, sexual orientation, gender identity or expression, veteran status, marital status, pregnancy or parental status, or disability. Applicants will not be discriminated against based on these or other protected categories or social identities.Rondo is committed to the full inclusion of all applicants. If reasonable accommodation is needed to participate in the interview process, please let our recruiting team know.We proactively work to design hiring processes that promote equity and inclusion while mitigating bias.Note to Recruitment Agencies:&nbsp;Rondo does not accept unsolicited agency resumes. Furthermore, Rondo Energy does not pay placement fees for candidates submitted&nbsp;by any agency other than its approved partners.

Senior Mechanical Engineer

About the Job

About the Company

Rondo Energy, Inc

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