Meet Sandstone

WeChallengethe Status Quo.

Sandstone’s mission is to make high quality medical testing ubiquitous by bringing centrifugation to the patient.

We are scientists, engineers, and professionals committed to solving some of healthcare’s biggest challenges with innovative technologies that empower patients and caregivers.

Meet Our Team

Gary Altman, PhD

Chief Executive Officer

Gary is an accomplished CEO, COO, VP and GM with more than 20-years’ experience in start-ups and global businesses including diagnostics, therapeutics, genomics, and life sciences. Gary's past positions include roles at Beckman Coulter, Human Longevity, and Sequoia Pharmaceuticals in addition to an expansive consulting career leading business and strategy initiatives for many small to mid-sized companies. Throughout his career, Gary has launched products, led turnarounds, expanded markets, raised Angel and Venture Capital, and managed budgets up to $250M.

Greg Sommer, PhD

CoFounder and Executive Vice President

Greg has over 15 years experience developing point-of-care diagnostic tools. Prior to cofounding Sandstone, he was a Senior Research Scientist at Sandia National Laboratories where he led R&D in point-of-care diagnostic technologies for biodefense and emergency preparedness applications. Greg is a co-inventor on over 20 issued patents, a co-author on 15 peer-reviewed publications, was named a 2015 Bay Area "40 Under 40", and earned his Mechanical Engineering degrees from Iowa State University and the University of Michigan.

Ulrich Schaff, PhD

CoFounder and Chief Technology Officer

Ulrich leads design and development of Sandstone's new products from concept phase through validation and clinical trials. In addition, as a registered patent agent, he is responsible for managing and expanding Sandstone's IP portfolio. Prior to Sandstone, Ulrich was a Research Scientist at Sandia National Laboratories where he invented the SpinDx point-of-care diagnostic platform. Ulrich is an inventor on over 15 issued patents and earned his degrees in Biomedical Engineering from UC Berkeley, UC San Diego, and UC Davis.

Brian Awabdy

VP of Operations and Quality
Brian is an experienced technical development and engineering leader, specializing in hands-on process and product development, continuous improvement, cross-functional project management, and engineering management. Prior to Sandstone, Brian held executive roles at Spirosure, CellScape, and Apieron where he managed a multi-year project to successfully commercialize and enhance the first biosensor-based Class II IVD medical device approved by the FDA. Brian earned his MS and BS degrees in Mechanical Engineering from UC Berkeley.

Deb Corazzelli, PhD


Deb is a commercial and marketing leader in clinical diagnostics (IVD, LDT, and molecular) and medical devices with broad experience spanning startups to multinational companies. Prior to Sandstone, Deb has held senior marketing and director positions at CareDx, Response Genetics, Pathwork Diagnostics, and Philips Medical Systems. Deb earned her BS in Clinical Laboratory Science from Ohio State University, and MBA from UCLA.

Dave Seltzer

Director of Finance

Dave has over 25 years experience providing financial leadership within tech and medical device companies. Dave's prior experiences include CFO positions with Koobimark, Animation Mentor, Step Communications, Four Star, Five9, BrandVia and Vicinity. Dave holds a BA in Business Studies from the Caledonian University in Glasgow, Scotland.

Kyungjin Hong, PhD

Senior Bioengineer
Kyungjin is a Biomedical Engineer with a data-driven mindset. With interdisciplinary backgrounds ranging from surface modification chemistry, nano- and microfabrication to microfluidics and biosensing, she designs and develops medical devices from early concept, prototyping, testing to production. As an ardent learner, Kyungjin is always seeking new learning opportunities and enjoys wearing different “new” hats at Sandstone. Kyungjin earned her PhD in Biomedical Engineering from UC Davis.

Gabriella Iacovetti

Associate Scientist

Gabriella’s primary role is leading Sandstone’s bioscience efforts. While everyone at Sandstone wears many hats, some of hers include clinical coordination, experimental design and execution, and leading on the job training for the R+D team. Prior to Sandstone, she studied biology at Azusa Pacific University and worked at Donor Network West where she partnered with hospital staff throughout California and Nevada to facilitate tissue donation for transplantation and research. She enjoys combining her passion for biology with her fast-paced clinical experience as a part of Sandstone’s innovative team!

Sean Hong, PhD

Research Engineer and Safety Officer

Sean is a physicist and engineer, leading Sandstone's prototyping, trouble-shooting and optimization of early-concept device development. He is deeply rooted in mathematics and physics, but also has multidisciplinary knowledge and experience including optics and lasers, lipid bilayer membrane study, machining and computer programming/language. Sean earned his PhD in Applied Science from UC Davis.

Jon Epperson

Operations and Research Associate
Jon joined Sandstone in 2013 after graduating from UC Berkeley with a B.A. in Cell and Molecular Biology. Jon has been heavily involved in the development, clinical trials, and manufacturing scale up of Sandstone's Trak Male Fertility Testing System, and supports Sandstone's operations, quality systems management, and manufacturing activities.

Angela Le

R&D Intern

Angela studied Bioengineering and received her Bachelor's of Science at the University of California, Los Angeles with special interest in medical device development. She works on new product design and prototyping at Sandstone Diagnostics under Research and Development.

Tifany Pan

R&D Intern
A recent graduate from UC Davis, Tifany helps design and prototype new devices for Sandstone. She loves learning new things on the engineering and biology side of things, as she is very curious about everything, and loves helping any way she can. In her spare time, she likes to exercise, try lots of food, be with family and friends, and play with her cat. She also enjoys reading, writing and learning even more things!

Jason Ragar

R&D Intern

Jason is a recent grad from San Jose State University where he earned his B.S. in Mechanical Engineering. At Sandstone, he assists with process development and secondary operations. Jason enjoys making things, whether it is something simple or complex, and he also likes to learn more about the world around him.

Board of Directors

Gary Altman, PhD

Chief Executive Officer

Greg Sommer, PhD

CoFounder and Executive Vice President

Bob Easton

Co-Chairman at Bionest Partners

Beto Pallares, PhD

Managing Director, Hunt Family Holdings

Faith Charles, JD

Partner, Corporate Transactions & Securities Practice/Chair, Life Sciences Group at Thomson Hine LLP

Scientific Advisory Board

Michael Eisenberg, MD

Director of Reproductive Medicine, Stanford University Medical Center

Steven Lipkin, MD PhD

Professor of Medicine, Clinical Genetics, Weill Cornell Medicine

Elizabeth Hutt Pollard

Director of Reproductive Medicine, Stanford University Medical Center

Priya Balachandran

Chief Operating Officer at Applied Silver, Inc.

Joseph Alukal, MD

Clinical Associate Professor, NYU Langone Health Department of Urology