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Meet our Team

The NumFOCUS staff is a dedicated team of professionals who support our mission to promote open practices in research, data, and scientific computing. From fundraising and community engagement to program management and operations, our staff works behind the scenes to empower our projects and drive innovation forward.

Staff

NumFOCUS Staff

Juan Nunez-Iglesias
Juan Nunez-Iglesias

A software engineer based in Japan, Tetsuo Koyama has a strong interest in scientific computing and visualization using computer graphics. As one of the primary developers of the PyVista project, he is deeply engaged in advancing open-source tools and technologies. His passion for open-source conference management and community support is reflected in his roles on the SciPy Conference management staff and as a volunteer for the NumFOCUS Election Committee.

Leah Silen
Leah Silen

Leah Silen has been with NumFOCUS from its beginning, working with the founding board members to write the application for NumFOCUS’s nonprofit status. Before joining NumFOCUS, she worked in the nonprofit sector as a Public Relations and Program Director with a focus on community relations and fundraising. Leah has also volunteered and sat on several boards of nonprofit organizations.

 
 
 
Jim Weiss
Jim Weiss

Jim Weiss joined NumFOCUS in 2017, bringing over seven years of event management experience to the organization. Prior to joining NumFOCUS, Jim worked in Washington, D.C., coordinating congressional hearings for the U.S. House of Representatives and managing events for the U.S. Air Force. Jim hails from Pennsylvania and graduated from Lafayette College.

 
Tomara Youngblood
Tomara Youngblood

Tomara joined NumFOCUS in 2022 as the Events Manager. Before joining NumFOCUS, she worked in municipal and non-profit recreation and event management for over 17 years. Tomara is a graduate of the University of North Texas.