<h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">Who You Are</h1>You are a hands-on, mechanically minded engineer who thrives in a lab and experimental environment. You enjoy rolling up your sleeves, working directly with robotics, CAD, materials, and tools, and helping turn prototypes into real-world prints. You are independent and proactive, able to take ownership of printing experiments and troubleshooting challenges as they arise. You bring:<ul style="margin:16px 0px;font-style:normal;font-weight:400;font-size:11pt;line-height:1.38;"><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">A Bachelor’s degree in Engineering (Civil, Mechanical, or related field).</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">1–3 years of experience in construction, prototyping, fabrication, or additive manufacturing.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Strong mechanical aptitude and comfort working with tools, machinery, and lab equipment.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Familiarity with CAD, robotics, or automated fabrication systems is a plus.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Bonus: Experience with 3D concrete printing, large-scale printing systems, or construction automation.</li></ul><h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">What You’ll Do</h1>As an R&amp;D Engineer at Sperra’s Los Angeles lab, you’ll support the development, testing, and implementation of next-generation materials and methods for large-scale 3D concrete printing systems. This role is highly hands-on and requires active participation in lab experiments, robot operation, CAD modeling, and materials testing. Key responsibilities include:<ul style="margin:16px 0px;font-style:normal;font-weight:400;font-size:11pt;line-height:1.38;"><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Operate and maintain large-scale 3D concrete printing systems, including setup, calibration, and troubleshooting.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Execute printing experiments from start to finish, including material preparation, robot operation, and post-print handling.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Work directly with concrete and other construction materials: mix, test, and monitor curing to ensure quality.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Assist in prototyping, assembly, and testing of new structural components or printing hardware.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Use CAD tools to review designs, prepare printing files, and modify models as needed.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Maintain lab equipment, tools, and robotics, ensuring proper functioning and safety compliance.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Record observations, collect data, and contribute to experiment documentation, technical reports, and presentations.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Support continuous improvement of printing processes, materials, and lab workflows through hands-on experimentation.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Ensure lab safety, organization, and proper handling of tools, machinery, and materials.</li></ul><h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">Qualifications</h1><h2 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:15pt;line-height:1.38;">Required</h2><ul style="margin:16px 0px;font-style:normal;font-weight:400;font-size:11pt;line-height:1.38;"><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">B.S. in Mechanical Engineering, Civil Engineering, Materials Science, or a related field.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">1–3 years of hands-on lab or industry experience in concrete, construction, or additive manufacturing.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Strong mechanical aptitude and experience using hand and power tools.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Experience with CAD software (e.g., SolidWorks, AutoCAD) or willingness to quickly learn.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Ability to work independently, take ownership of experiments, and troubleshoot practical challenges.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Strong problem-solving, organizational, and communication skills.</li></ul><h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">Preferred</h1><ul style="margin:16px 0px;font-style:normal;font-weight:400;font-size:11pt;line-height:1.38;"><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">M.S. or Ph.D. in Mechanical Engineering, Civil Engineering, Materials Science, or a related discipline.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Experience with 3D concrete printing, large-scale additive manufacturing, or robotic systems.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Familiarity with concrete mix design, curing, and mechanical testing.</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Exposure to prototyping, fabrication, and mechanical assembly.</li></ul> <h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">What You’ll Get</h1><ul style="margin:16px 0px;font-style:normal;font-weight:400;font-size:11pt;line-height:1.38;"><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Annual salary: $70,000 – $135,000, based on experience</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Full-time, on-site in Los Angeles</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">10 paid holidays annually</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">4 weeks PTO + 6 paid sick days per year</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Health, dental, and vision insurance</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">401(k) retirement savings plan</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Preferred computer and peripherals provided</li><li style="margin-top:0px;margin-bottom:0px;font-size:11pt;line-height:1.38;">Career development and mentorship in a growing cleantech startup</li></ul> <h1 style="margin-right:0px;padding:0px;font-style:normal;font-weight:600;font-size:18pt;line-height:1.38;">Why Join Sperra</h1>This is a unique opportunity to grow with a startup at the forefront of renewable energy, advanced manufacturing, and concrete technology. Your work will directly support critical infrastructure innovations that contribute to energy transition and climate resilience. Sperra is an equal opportunity employer and is committed to fostering an environment that is inclusive and welcoming for leadership and team members with different backgrounds, identities, and lived experiences. By welcoming diversity, we mean that our organization embraces differences in identity, age, culture, ancestry, ethnicity, race, color, sexual orientation, physical ability, learning style, religion, familial status, marital status, occupation, veteran status, nationality, and the many forms of composite subjectivity and life experiences. Hence, we strongly encourage applications from BIPOC (Black, Indigenous, and People of Color) individuals, people from working-class backgrounds, women, LGBTQIA+ people, and veterans.

Founded in 2017, RCAM Technologies is a climate tech startup dedicated to reducing the cost of renewable energy and creating domestic jobs using automated concrete manufacturing technologies. RCAM is developing and demonstrating a suite of 3D printed concrete products including wind turbine towers, anchors for floating solar, wave, and wind energy systems, and a long-duration subsea energy storage technology. In 2022, RCAM installed its 3D concrete printing system in AltaSea at the Port of Los Angeles, establishing the world&rsquo;s first facility for 3D concrete printing R&amp;D and prototyping in a port. RCAM has received funding from agencies including the&nbsp;National Science Foundation, Department of Energy, California Energy Commission, NYSERDA, and NOWRDC. RCAM received the 2021 Innovation of the Year Award from the Business Network for Offshore Wind for its modular concrete fixed bottom foundation and won &ldquo;Highest Potential Impact&rdquo; in the 2022 National Energy Storage Summit Pitchfest hosted by Lawrence Berkeley National Laboratory.

R&D Engineer

<h1>Who You Are</h1>You are a hands-on, mechanically minded engineer who thrives in a lab and experimental environment. You enjoy rolling up your sleeves, working directly with robotics, CAD, materials, and tools, and helping turn prototypes into real-world prints. You are independent and proactive, able to take ownership of printing experiments and troubleshooting challenges as they arise. You bring:<ul><li>A Bachelor’s degree in Engineering (Civil, Mechanical, or related field).</li><li>1–3 years of experience in construction, prototyping, fabrication, or additive manufacturing.</li><li>Strong mechanical aptitude and comfort working with tools, machinery, and lab equipment.</li><li>Familiarity with CAD, robotics, or automated fabrication systems is a plus.</li><li>Bonus: Experience with 3D concrete printing, large-scale printing systems, or construction automation.</li></ul><h1>What You’ll Do</h1>As an R&amp;D Engineer at Sperra’s Los Angeles lab, you’ll support the development, testing, and implementation of next-generation materials and methods for large-scale 3D concrete printing systems. This role is highly hands-on and requires active participation in lab experiments, robot operation, CAD modeling, and materials testing. Key responsibilities include:<ul><li>Operate and maintain large-scale 3D concrete printing systems, including setup, calibration, and troubleshooting.</li><li>Execute printing experiments from start to finish, including material preparation, robot operation, and post-print handling.</li><li>Work directly with concrete and other construction materials: mix, test, and monitor curing to ensure quality.</li><li>Assist in prototyping, assembly, and testing of new structural components or printing hardware.</li><li>Use CAD tools to review designs, prepare printing files, and modify models as needed.</li><li>Maintain lab equipment, tools, and robotics, ensuring proper functioning and safety compliance.</li><li>Record observations, collect data, and contribute to experiment documentation, technical reports, and presentations.</li><li>Support continuous improvement of printing processes, materials, and lab workflows through hands-on experimentation.</li><li>Ensure lab safety, organization, and proper handling of tools, machinery, and materials.</li></ul><h1>Qualifications</h1><h2>Required</h2><ul><li>B.S. in Mechanical Engineering, Civil Engineering, Materials Science, or a related field.</li><li>1–3 years of hands-on lab or industry experience in concrete, construction, or additive manufacturing.</li><li>Strong mechanical aptitude and experience using hand and power tools.</li><li>Experience with CAD software (e.g., SolidWorks, AutoCAD) or willingness to quickly learn.</li><li>Ability to work independently, take ownership of experiments, and troubleshoot practical challenges.</li><li>Strong problem-solving, organizational, and communication skills.</li></ul><h1>Preferred</h1><ul><li>M.S. or Ph.D. in Mechanical Engineering, Civil Engineering, Materials Science, or a related discipline.</li><li>Experience with 3D concrete printing, large-scale additive manufacturing, or robotic systems.</li><li>Familiarity with concrete mix design, curing, and mechanical testing.</li><li>Exposure to prototyping, fabrication, and mechanical assembly.</li></ul>&nbsp;<h1>What You’ll Get</h1><ul><li>Annual salary: $70,000 – $135,000, based on experience</li><li>Full-time, on-site in Los Angeles</li><li>10 paid holidays annually</li><li>4 weeks PTO + 6 paid sick days per year</li><li>Health, dental, and vision insurance</li><li>401(k) retirement savings plan</li><li>Preferred computer and peripherals provided</li><li>Career development and mentorship in a growing cleantech startup</li></ul> <h1>Why Join Sperra</h1>This is a unique opportunity to grow with a startup at the forefront of renewable energy, advanced manufacturing, and concrete technology. Your work will directly support critical infrastructure innovations that contribute to energy transition and climate resilience. Sperra is an&nbsp;equal opportunity employer and is committed to fostering an environment that is inclusive and welcoming for leadership and team members with different backgrounds, identities, and lived experiences. By welcoming diversity, we mean that our organization embraces differences in identity, age, culture, ancestry, ethnicity, race, color, sexual orientation, physical ability, learning style, religion, familial status, marital status, occupation, veteran status, nationality, and the many forms of composite subjectivity and life experiences. Hence, we strongly encourage applications from BIPOC (Black, Indigenous, and People of Color) individuals, people from working-class backgrounds, women, LGBTQIA+ people, and veterans.

R&D Engineer

About the Job

About the Company

RCAM Technologies

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