D. J. Rasmussen
Founder, Chief Scientist @Degree Day
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WORK HISTORY
Founder, Chief Scientist @Degree Day
San Diego, CA, US
Degree Day provides expert-driven climate intelligence for infrastructure and capital decisions. We help organizations navigate physical climate risks through tailored analysis, engineering-grade datasets, and independent technical review. We turn climate uncertainty into informed action. Founded by climate scientists specializing in extreme weather and resilience planning.
EDUCATION
University of Wisconsin-Madison
BS, Atmospheric and Oceanic Science
University of California, Davis
MS, Civil and Environmental Engineering
Princeton University
Doctor of Philosophy (Ph.D.), Applied Climate Science, Impacts, and Policy
ABOUT D. J. RASMUSSEN
Founder of Degree Day. We help organizations protect infrastructure investments from climate risks where mistakes are expensive.Utilities, transit agencies, data center operators, and governments face a difficult reality. Climate science is complex, datasets often disagree, and decisions about sea level rise, coastal flooding, and extreme weather carry real financial and regulatory consequences. Simplistic answers can create false confidence and costly outcomes.Degree Day exists for the cases where the details matter. We translate climate research into decision-ready risk assessments that are designed to hold up under technical, regulatory, and stakeholder review. Our clients rely on us when they need to understand which data, assumptions, and methods are appropriate for their specific asset and decision context.We work with Fortune 500 companies, federal and state agencies, utilities, transit organizations, and data center operators managing climate-vulnerable infrastructure.What sets our work apart is depth and discipline. We bring over 15 years of applied climate research and practitioner experience, with expertise in sea level rise, coastal flooding, and infrastructure resilience. Our work has been published in Science and Nature Climate Change, which means we are trained to evaluate uncertainty, limitations, and failure modes, not just produce clean narratives.We are comfortable saying when the data does not support a definitive answer. Our goal is not to sell certainty, but to help clients make informed, defensible decisions in the face of uncertainty.If you are facing high-stakes climate risk decisions and need guidance grounded in real science rather than hype, let’s connect. Learn more at or message me here.
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