Join Our Cause

Help us work towards another successful project implementation. Our work would not be possible without the generous team of supporters that design, build and report on our projects. Not an engineer? No problem! Our organization goes beyond engineering and we would love your support with grant pursuit, fundraising, education curriculum development, website and social media support, or any other ideas that you can bring to the table. Now is the time to get involved! Click below to donate or join our team as a volunteer.

Callie Charleton, President

Callie graduated from Cal Poly, San Luis Obispo with a bachelor’s in environmental engineering in 2021. She became involved with EWB in 2018 helping to start a chapter at Cuesta College and presenting about the experience at the 2019 EWBUSA conference. In 2020, she authored a paper and presented it at the American Society for Engineering Education conference on the collaboration between community colleges and 4-year colleges in EWB. Outside of engineering, she enjoys travel, having been to 20 countries and lived in Spain teaching elementary school English.

Jagvir Singh, Vice President

Jagvir graduated from San José State University with a bachelor’s degree in Civil and Environmental Engineering in the winter of 2023. He became involved with EWB in 2024 to fulfill his lifelong passion of helping those in need. Jagvir hopes to use his engineering experience to create a world where everyone has an equal opportunity no matter their situation. Outside of EWB you can find Jagvir exploring the world, whether it is through hiking local trails or travelling around the Earth to experience all the world has to offer.

Malia Helms, Fundraising Co-Lead

Malia studied Biological Systems Engineering and competed in shot put on the Track and Field team at UC Davis. She currently ensures the public has access to safe drinking water as a Water Resource Engineer and is in the final steps in becoming a Professional Civil Engineer. Malia joined EWB in 2024 to help people in need of clean drinking water in other countries. She also traveled to Peru in 2024 to implement the Vista Allegre Phase II project! After work and EWB you can find Malia exploring the outdoors and doing crossfit or hot pilates.

Christine Strong, Project Lead

Christine studied Civil Engineering at Cal Poly, San Luis Obispo, with an emphasis on structural design. She has been practicing structural engineering since 2020, including some time in residential design before moving into her current role in the temporary structural design and construction industry. Christine enjoys a busy schedule, filling her days with practicing yoga, cooking with friends, exploring local hiking trails, and picking up new hobbies.

Tebrez Khan, Assistant Project Lead

Tebrez graduated with a bachelor’s degree in Architectural Engineering from Cal Poly, San Luis Obispo and is currently a Designer at ZFA Structural Engineers. He joined EWB in 2023 with the goal to help people gain access to the basic necessities which he has taken for granted his whole life.

Chuck Corley, Mentor

Chuck graduated with bachelor’s and master’s degrees in Electrical/Electronic Engineering from California State University Sacramento. Chuck retired from his career in 2021. Our longest standing volunteer, Chuck joined EWB in 2015 with a desire to use his engineering skills to help people. Outside of EWB, Chuck adventures through the outdoors – biking, hiking, skiing and snowboarding.

Dennis Johnston, Mentor

Dennis graduated with a bachelor’s degree in Architectural Engineering from California Polytechnic State University, San Luis Obispo. Dennis recently moved into construction in WA state after 4 years practicing as a structural engineer. He joined EWB in 2017 to help use his education for good. Outside of work, Dennis is usually enthralled in whatever random hobby has caught his eye, from ceramics to mountain biking.

Kevin Marx, Mentor

Kevin Marx graduated with a bachelor’s degree in architectural engineering from California Polytechnic State University, San Luis Obispo. Kevin has practiced structural engineering for 8 years in Sonoma County and specializes in winery, residential, and essential service structures. He joined EWB in 2021 and recently help implement the Amazonas 2023 system. Beyond EWB, you can find Kevin playing sports or experimenting in the kitchen.

Ryan Krostag, Mentor

Ryan Krostag graduated with bachelor’s and master’s degrees in Civil Engineering from California Polytechnic State University, San Luis Obispo. Ryan joined EWB in 2020 to help people with limited opportunities to increase their quality of life in ways that can be passed down to future generations. Outside of work, Ryan perfects his home brewing recipes and shares the exploits with friends and colleagues.

Joe Giesa, Mentor

Joe Giesa graduated with a bachelor’s degree in Civil Engineering from California Polytechnic State University, San Luis Obispo. Joe is a practicing engineer with 3 years experience in Sonoma County. He joined EWB in 2021 because of welcome suggestions from friends and colleagues to combine his passion for volunteer work with his industry experience. Joe loves playing guitar and making music.