Keller is cofounder and CTO of Via Separations, which develops membrane materials for separation processes. Separations are a capital-intensive part of chemical manufacturing, and the company's membranes can reduce costs while improving performance. Keller and three older cofounders are now part of MIT's The Engine accelerator program.
The Pittsburgh Pirates are 13-13, chasing their first season with a winning record since 2018, and Paul Skenes—the best pitching prospect in MLB—awaits in the minors.