Exowatt

Modular full-stack renewable energy for businesses

Lead Materials Engineer

Mechanical EngineeringConfirmed live in the last 24 hours

Full-timeMiami, FL, USA

About the Job

Requirements

A PhD in Materials Science, Chemical Engineering, Mechanical Engineering, or a related field, with demonstrated expertise in high-temperature materials, thermal energy storage, or related advanced materials systems.
A minimum of 5 years of deep research experience in materials engineering; experience in renewable energy, aerospace, concentrated solar power, or advanced energy storage industries is preferred.
A proven track record of breakthrough research demonstrated by high-impact publications, patents, and successful technology transitions from laboratory to commercial applications.
Extensive hands-on experience with high-temperature ceramics, refractory alloys, optical materials, thermal barrier coatings, and phase change materials.
Deep understanding of materials thermodynamics, kinetics, and processing methods, including powder metallurgy, additive manufacturing, thin film deposition, and crystal growth.
Expertise in advanced characterization techniques and statistical analysis of materials data.
Experience with computational materials science tools, including density functional theory, molecular dynamics, and finite element modeling.
Demonstrated success translating research into commercially viable materials solutions.
Experience working in fast-paced, high-growth technology companies or leading research institutions.
A track record of cross-functional collaboration in complex engineering systems.

Responsibilities

Lead research into high-temperature thermal storage materials, optical concentrators, and heat engine components operating under extreme thermal cycling conditions.
Develop novel material compositions and processing techniques for sensible heat battery technology that can withstand temperatures exceeding 1000°C.
Conduct fundamental research into thermal conductivity, heat capacity, thermal expansion, and long-term stability of advanced ceramics, refractory metals, and composite materials.
Collaborate with mechanical, thermal, and optical engineers to solve multi-physics problems involving materials science, thermodynamics, and optics.
Lead materials selection and optimization for Fresnel lens systems, including optical materials, coatings, and durability under concentrated solar radiation.
Drive materials innovation for Stirling engine components, including high-temperature alloys, tribology, and fatigue resistance.
Design and execute materials testing protocols using X-ray diffraction, scanning and transmission electron microscopy, differential scanning calorimetry, thermogravimetric analysis, mechanical testing, and thermal cycling.
Perform failure analysis and root-cause investigations to improve material performance and system reliability.
Develop predictive models for material behavior under extreme thermal and mechanical loading conditions.
Lead materials cost optimization initiatives while maintaining performance requirements and balancing material properties with manufacturability and scalability.
Establish strategic partnerships with materials suppliers and research institutions to advance next-generation thermal storage materials.
Drive intellectual property development through patents and publications in high-impact journals.
Mentor junior engineers and technicians in advanced materials characterization and testing methodologies.
Create technical documentation, including research reports, material specifications, testing protocols, and manufacturing guidelines.
Present research findings to executive leadership, investors, and industry conferences.

Desired Qualifications

Research experience in renewable energy, aerospace, concentrated solar power, or advanced energy storage industries is preferred.

Salary Range: 170000 to 215000 (Currency: USD) (Pay period: per-year-salary)

Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.

We are seeking an exceptional Lead Materials Engineer with deep research expertise to spearhead materials innovation for our revolutionary thermal energy storage technology. This role demands a PhD-level researcher who thrives on solving complex, multi-physics materials challenges that push the boundaries of what's possible in renewable energy.

This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.

What You'll Do:

Advanced Materials Research & Development:
Lead cutting-edge research into high-temperature thermal storage materials, optical concentrators, and heat engine components operating in extreme thermal cycling conditions
Develop novel material compositions and processing techniques for our proprietary sensible heat battery technology that must withstand temperatures exceeding 1000°C
Conduct fundamental research into thermal conductivity, heat capacity, thermal expansion, and long-term stability of advanced ceramics, refractory metals, and composite materials

Cross-Disciplinary Innovation:
Collaborate with our world-class team of mechanical, thermal, and optical engineers to solve complex multi-physics problems at the intersection of materials science, thermodynamics, and optics
Lead materials selection and optimization for our Fresnel lens systems, requiring expertise in optical materials, coatings, and durability under concentrated solar radiation
Drive materials innovation for heat engine components (Stirling engines) requiring expertise in high-temperature alloys, tribology, and fatigue resistance

Advanced Characterization & Analysis:
Design and execute sophisticated materials testing protocols using advanced characterization techniques (XRD, SEM/TEM, DSC/TGA, mechanical testing, thermal cycling)
Perform failure analysis and root cause investigations to continuously improve material performance and system reliability
Develop predictive models for material behavior under extreme thermal and mechanical loading conditions

Strategic Materials Engineering:
Lead materials cost optimization initiatives while maintaining performance requirements—balancing advanced material properties with manufacturability and scalability
Establish strategic partnerships with materials suppliers and research institutions to advance next-generation thermal storage materials
Drive intellectual property development through patents and publications in high-impact journals

Technical Leadership:
Mentor junior engineers and technicians in advanced materials characterization and testing methodologies
Create comprehensive technical documentation including research reports, material specifications, testing protocols, and manufacturing guidelines
Present research findings to executive leadership, investors, and at prestigious industry conferences

Required Experience

Research Excellence:
PhD in Materials Science, Chemical Engineering, Mechanical Engineering, or related field with demonstrated expertise in high-temperature materials, thermal energy storage, or related advanced materials systems
Minimum 5 years of deep research experience in materials engineering, with preference for renewable energy, aerospace, concentrated solar power, or advanced energy storage industries
Proven track record of breakthrough research evidenced by high-impact publications, patents, and successful technology transitions from lab to commercial applications

Technical Expertise:
Extensive hands-on experience with advanced materials including high-temperature ceramics, refractory alloys, optical materials, thermal barrier coatings, and phase change materials
Deep understanding of materials thermodynamics, kinetics, and processing methods (powder metallurgy, additive manufacturing, thin film deposition, crystal growth)
Expertise in advanced characterization techniques and statistical analysis of materials data
Experience with computational materials science tools (DFT, molecular dynamics, finite element modeling)

Industry Impact:
Demonstrated success in translating research into commercially viable materials solutions
Experience working in fast-paced, high-growth technology companies or leading research institutions
Track record of cross-functional collaboration in complex engineering systems

What We Offer:

Competitive salary and equity options.

Comprehensive benefits package, including health, dental, and retirement plans.

A dynamic and inclusive work environment that fosters creativity and innovation.

Opportunities for professional growth and development in a rapidly evolving industry.

Relocation assistance.

About the Company

Exowatt

Modular full-stack renewable energy for businesses

Exowatt designs, installs, and maintains modular full-stack renewable energy systems for commercial and industrial clients. Its products are customizable energy solutions built from modular components that can be designed to meet specific energy needs and regulatory requirements, then installed on-site and supported through ongoing maintenance. The company’s approach combines consulting, system design, installation, and long-term service into a single, integrated package, enabling a seamless transition to renewables. This end-to-end service helps clients scale energy capacity as needed and manage energy performance over time. Exowatt differentiates itself by offering a true full-stack, modular package that covers from initial assessment to ongoing upkeep, fostering long-term relationships rather than one-off projects. Its goal is to help businesses lower both their carbon footprint and energy costs by moving to renewable energy with adaptable, scalable systems.

Company size: 51-200
Company stage: Series A
Total funding: $90M
Headquarters: Miami, FL
Founded: 2023

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