Committed to men's reproductive health

Trak is designed and built by Sandstone Diagnostics in California’s Livermore Valley. 

Founded in 2012 in part by government scientists from Sandia National Laboratories, Sandstone’s mission is to provide innovative, data-driven tools to help men assess, manage, and improve their reproductive health.

We are a team of scientists, engineers, software developers, and business professionals. But more importantly we are fathers, mothers, brothers, sisters, and friends who care deeply about improving men’s reproductive health and helping people start their family.

Who We Are

Karen Drexler


Paul Manners


Greg Sommer

Founder & CSO

Ulrich Schaff

Founder & CTO

Sara Naab

Founder & Director of Marketing

Stephanie Fry

Director of Marketing

Dave Hasker

VP of Operations & Quality

Troy Simon

Director of Software Development

Michael Eisenberg, MD

Chief Medical Advisor


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Learn More About Us

Contact Us


6111J Southfront Road

Livermore CA 94551

Call Us

1(888) 241-2476


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