Marian Van Pelt

Marian is a climate change and sustainability experience expert with over 20 years of experience. She leads business relating to greenhouse gas (GHG) management, climate adaptation and resilience, transportation, and energy activities.

Nominated by the U.S. to the United Nations Framework Convention on Climate Change’s (UNFCCC) Roster of Experts, Marian provides GHG inventory systems training and technical assistance to clients worldwide. She prepares monitoring and evaluation tools to appraise emissions reductions, support baseline development, and quantify emission reduction potential across various federal, municipal, and commercial organizations. She advocates for transparency in many developing countries by designing tools and providing training to enable national governments to quantify emissions and create and track the impact of reduction policies.

A lead reviewer for the UNFCCC’s National Communications and Biennial Reports, Marian supports expert review teams from the U.K., Belgium, and Denmark. She is a previous technical working group member and chapter lead for the WRI Greenhouse Gas Protocol’s Mitigation Goal Standard and the technical working group for two volumes of the Initiative for Climate Action Transparency. Marian also contributes to numerous additional GHG protocols and calculators for federal agencies, corporate clients, and other organizations.

In 2023, Marian was named Washington Exec's Climate Change Exec of the Year (Public Company) and a FORUM Leading for Impact honoree.