Exowatt is a next generation renewable energy company offering commercial and industrial customers a modular full-stack energy solution that can provide dispatchable power and heat for up to 24 hours per day, specifically designed to meet the needs of energy-intensive applications such as data centers. Our mission is clear, to make sustainable renewable energy always available and almost free. Exowatt is based in Miami, Florida and backed by notable investors such as a16z, Atomic, Sam Altman, and Felicis.
We are seeking an exceptional Thermal Engineering Lead - Battery to drive the thermal management strategy for our groundbreaking thermal battery systems. This senior technical role focuses on developing and optimizing cutting-edge thermal solutions that maximize energy storage efficiency while ensuring optimal performance across diverse operating environments.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
What You'll Do
Advanced Thermal System Development
Design, analyze, and optimize sophisticated thermal management systems for Exowatt's thermal battery products
Develop thermal architecture solutions for next-generation energy storage systems, balancing performance, efficiency, and manufacturability
Create thermal design standards and technical specifications for product development
Pioneer innovative approaches to thermal energy storage and heat transfer optimization
Engineering Analysis & Simulation
Perform complex thermal analysis using advanced simulation tools and experimental validation methods
Conduct thermal performance modeling and prediction for large-scale battery storage systems
Execute finite element analysis (FEA) and computational thermal design for critical components
Develop and validate sophisticated thermal models that inform design decisions
Technical Integration & Collaboration
Work with mechanical, electrical, and systems engineering teams to integrate optimal thermal solutions
Collaborate with manufacturing and quality teams to ensure thermal designs are production-ready
Partner with product teams to translate thermal requirements into market-leading products
Participate in technical reviews and provide thermal expertise for design decisions
Testing & Validation
Develop and implement comprehensive thermal testing strategies, including thermal cycling, environmental testing, and accelerated life testing
Design and execute prototype testing programs that validate thermal performance under real-world conditions
Conduct failure analysis investigations and implement systematic corrective actions
Establish thermal qualification procedures for new product introductions
Technical Excellence & Documentation
Create detailed technical documentation including design specifications, testing protocols, and analysis reports
Develop technical presentations for internal teams, customers, and industry conferences
Build relationships with thermal technology vendors and research institutions
Contribute to Exowatt's thermal engineering knowledge base and best practices
Product Development Support
Support full product development lifecycle from early concept through commercial production
Ensure thermal requirements and performance targets are achieved throughout development
Drive continuous improvement initiatives to maximize energy storage efficiency and system reliability
Provide thermal expertise for manufacturing optimization and cost reduction
What You Bring
Education & Experience
BS/MS/PhD in Mechanical Engineering, Thermal Engineering, or related field
7+ years of progressive thermal engineering experience in energy systems or related industries
Proven track record developing thermal solutions for complex engineering systems
Experience with energy storage, battery systems, or high-temperature thermal management
Technical Expertise
Expert-level understanding of heat transfer fundamentals in complex energy systems
Advanced proficiency with mechanical CAD software (SolidWorks, CATIA, or similar)
Extensive experience with thermal analysis software (ANSYS Fluent, COMSOL, or equivalent)
Deep expertise in finite element analysis (FEA) and computational thermal design
Demonstrated experience designing high-efficiency heat exchangers for demanding applications
Specialized Experience
Experience with thermal management of large-scale energy storage systems
Background in thermal analysis of systems operating in challenging environments (high temperature, outdoor, industrial)
Knowledge of thermal interface materials, phase change materials, and advanced heat transfer technologies
Experience with thermal testing equipment and measurement systems
Understanding of thermal safety considerations in energy storage applications
Technical Skills & Abilities
Excellent analytical and problem-solving skills with systematic approach to root cause analysis
Strong technical communication skills with ability to present complex thermal concepts
Ability to work independently while collaborating effectively across disciplines
Experience with thermal materials and components selection and specification
Capability to make data-driven engineering decisions under tight timelines
Industry Knowledge
Experience with renewable energy systems, battery technology, or thermal energy storage
Knowledge of relevant industry standards and regulations (UL, IEC, etc.)
Understanding of manufacturing processes for thermal systems
Familiarity with thermal materials and components supply chains
Awareness of current trends in thermal energy storage technology
Preferred Qualifications
PhD in Thermal/Mechanical Engineering with focus on energy storage or heat transfer
10+ years of thermal engineering experience in energy, automotive, or aerospace industries
Experience with molten salt systems, concentrated solar power, or thermal energy storage
Background in startup or high-growth technology companies
Published research in thermal engineering or energy storage
Professional engineering license (PE)
Experience with thermal simulation of grid-scale energy systems
$180,000 - $215,000 a year
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.