Yoon Hui Kim

Director of Advisory Services

Yoon is an adaptation expert with ten years of experience supporting the integration of climate change into planning and decision-making in the Caribbean, West and East Africa, South and Southeast Asia, and the U.S. (primarily in California). At Four Twenty Seven, she works with local and state governments to deliver climate vulnerability assessments and adaptation policy consulting. Yoon is also responsible for activities ranging from business development and partnerships to project management, analysis, and delivery.


We founded Four Twenty Seven as a mission-driven business to provide innovative tools and services to organizations seeking to understand climate impacts, assess risks to their operations or their stakeholders, and increase their resilience by developing and implementing climate adaptation measures. Our team is constituted of risk analysts, climate change and adaptation experts who bring years of experience working on climate mitigation and adaptation in the energy, industry, agricultural and food sector.