Director of Semiconductor Technology

About Helion We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone. Since Helion's founding in 2013, we have raised $1.5 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors including Thrive Capital, LightSpeed Venture Capital, SoftBank, and others to propel us forward. Our current prototype, Polaris, has reached record-breaking plasma temperatures of 150 million degrees Celsius (13 keV). Helion is continuing to iterate and on the path to the world's first fusion power plant, Orion. This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait. WHY THIS ROLE MATTERS Every Helion fusion pulse runs current through semiconductor switches operated well beyond commercial ratings. Our next generation of fusion machines requires devices designed for our circuits rather than adapted to them, gated devices integrated as multi-die modules, and packaging that survives repetitive high-energy pulsing for power plant-scale lifetimes. You will lead the team that delivers these, from device physics through a development-scale fabrication capability to pilot module assembly and test, and you will carry it into high-volume production with external fabrication partners. Your team’s work will help determine how reliably Helion’s power plants operate, how frequently they can pulse, and how effectively we can manufacture and deploy future plants. WHAT YOU WILL BE DOING - Own Helion’s semiconductor roadmap, working with technical leadership to define device requirements, make build-versus-buy decisions, and deliver the capabilities needed for successive generations of fusion machines - Build and lead a focused, multi-disciplinary team of semiconductor scientists, device R&D engineers, technicians, and a technical project manager - Stand up a development-scale device fabrication, characterization and reliability capability, and own the tooling, process, and facility decisions behind it - Direct in-house device design, including alternative device topologies optimized for Helion's pulsed-power circuits - Drive novel packaging and integration: multi-die packages for gated devices used in series, deeply integrated thermal management for repetitive operation, and the reliability program that qualifies them - Establish and lead partnerships with high-volume fabrication facilities so that devices developed in-house transfer cleanly to production at scale. Continue to develop Helion's existing device vendor relationships - Plan and run a multi-million-dollar development program, including scope funded through external research partnerships, with the rigor, reporting, and risk management to match - Work with electrical, mechanical, science, operations, and systems leadership to develop semiconductor capabilities and machine architecture together REQUIRED SKILLS - 12+ years in semiconductors, including 5+ years leading technical teams - A track record of hiring and developing engineers and technical leaders, and setting a culture of high performance and delivery - Deep expertise in power semiconductor device physics and design, including device modeling and design for reliability - Hands-on expertise in high-power packaging and module integration: die attach, interconnect, and thermal management - Experience taking a custom semiconductor device from concept through fabrication, characterization, qualification, application integration, and high-volume production with external fabricators - Experience owning a multi-year R&D program with a budget in the tens of millions, from planning and vendor contracting through executive-level reporting - Set technical direction across disciplines you do not directly practice, and to make build/buy tradeoffs considering performance, reliability, cost, schedule, and manufacturing scale - Bachelor’s degree in electrical engineering, Physics, Materials Science or a related field #LI-Onsite #LI-MT1 Benefits Our total compensation package includes benefits, including but not limited to: - Medical, Dental, and Vision plans for employees and their families - 31 Days of PTO (21 vacation days and 10 sick days) - 10 Paid holidays, plus company-wide winter break - Up to 5% employer 401(k) match - Short term disability, long term disability, and life insurance - Paid parental leave and support (up to 16 weeks) - Annual wellness stipend Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.