OIST is an English-speaking and dynamic doctoral program-only university in Japan. We invite applications for tenure-track and tenured faculty positions in Mathematical Sciences and Energy and Sustainability. We provide sustained research funding, full administrative support, world-class core facilities with support staff, support technology transfer, outreach, and collaborations. We seek to hire three faculty members in each area, with a focus on diversity, aiming to hire women and underrepresented groups. The application deadline is October 15, with a negotiable start date. Please visit https://www.oist.jp/careers/faculty-positions. OIST has no faculty hierarchies and is a thriving international research community with representation from 80+ countries.