About Us


1. Create an opportunity to pursue and recognize excellence in the Earth and environmental sciences through individual competition, team collaboration, and field work for US high school students.

2. Increase general visibility and legitimacy of Earth and environmental science to students as a viable academic and career path.

3. Select and train 8 team members for international competition.


[email protected]

General inquiries, financial assistance, and registration-related matters

[email protected]

Questions about assessments, preparation, and resources

Program Director: Chelsea Brunner | [email protected]

Chelsea Brunner is currently a physical science teacher in Tulsa, Oklahoma. She has taught for 6+ years at elementary, middle school, high school, and college levels across the globe – including New York City and Japan. While Chelsea has taught a wide range of topics in geology, her specialty is meteorites. Chelsea holds two master’s degrees, one in geochemistry from the University of New Mexico and the other in science education from Columbia University in New York. She is passionate about earth science and spent several years working in one of the world’s largest gold mines as an underground ore control geologist. Chelsea is excited about our upcoming cohort of earth science students and can’t wait to get into the field to talk about rocks.

Volunteer Director: Ben Choi | Personal Website | [email protected]

Ben was formerly a member of the U.S. Earth Science Team in 2017 and is currently an undergraduate studying electrical engineering at Stanford. Students interested in gaining the student perspective on USESO or peer-to-peer advice on studying/resources should not hesitate to reach out at the email listed above. Alumni who are looking to help out with the program should also reach out to this email.


useso.org was created and designed by Ben Choi, a former member of the U.S. Earth Science Team in France 2017, and Chloe Cheng, a former member of the U.S. Earth Science Team in South Korea 2019.

Ben Choi the Science Boi