Diana Hasegan-Dan is a licensed Professional Engineer and ENVISION Sustainability Professional, with over seven years of experience in water resources, water quality, environmental engineering, and sustainability. She has engineered solutions for corrective actions, alternative analyses, and feasibility studies for storm water and groundwater treatment systems. She has also provided Phase I and Phase II reporting for environmental due diligence, remediation design, installation, and operations. She is also passionate about sustainability, and has been involved in many facets of sustainability from corporate sustainability plans to sustainable designs and solutions.

She holds several leadership roles in the American Society of Civil Engineers as the Seattle Section President-Elect, Seattle Sustainability Committee President, and member of the Society level Committee on Sustainability. Within the Interstate Technology and Regulatory Council, she leads the Design Subgroup under the Stormwater BMPs Working Group, which is looking to develop comprehensive nation-wide guidance on the design and performance monitoring of Stormwater Best Management Practices.