The University of Calgary is recruiting PhD students and postdoctoral researchers in the areas of mathematical modeling, optimization, and renewable energy systems, with opportunities in both the Department of Mathematics and Statistics and the Department of Earth, Energy and Environment. The PhD positions are available for the Fall 2026 semester through the PhD in Mathematics and Statistics or PhD in Geoscience programs. Research topics include mathematical modeling and optimization for power and energy systems, with applications in renewable energy, atmospheric modeling, wind and solar farm modeling, and electricity markets. The programs offer a rich curriculum covering pure and applied mathematics, statistics, probability, and geoscience, with opportunities for interdisciplinary research and collaboration. Applicants should have a strong academic background in mathematics, statistics, geoscience, or related fields, and demonstrate a passion for research in mathematical modeling and energy systems. International applicants must provide proof of English proficiency. The postdoctoral position, hosted by the University of Calgary and supported by the Pacific Institute for the Mathematical Sciences (PIMS), focuses on forecasting and mathematical modeling for renewable energy. The position offers a minimum salary of 57,000 CAD per year plus benefits and may be combined with sessional teaching. Application materials for PhD positions include CV, transcript, and a statement of research interests, while postdoc applicants must submit a cover letter, CV, research statement, and reference letters online. The application deadline for Fall 2026 admission is January 15, 2026. For more information, visit the provided program and application links.