
ABOUT US
DOMESTIC QUALITY. EXCEPTIONAL VALUE.
Rincon runs high-quality in vivo cancer efficacy studies at our U.S. facilities, keeping your work close, protecting your IP, and making communication direct and easy. We bring the scientific experience you’d expect from a major CRO without all the layers and overhead.
DIRECT ACCESS
Work directly with the PhD running your study—not a rotating account manager. We stay responsive, flexible, and hands-on throughout the study.

Founded in 2013, Rincon Bio is a U.S.-based preclinical CRO focused on in vivo cancer efficacy studies, including xenograft and syngeneic models.
Our scientists have worked in pharma, academia, and major CROs and bring experience from thousands of in vivo studies for pharmaceutical, biotechnology, and academic organizations across North America, Europe, and Asia.
We intentionally operate with a small, experienced team. That means less bureaucracy, lower unnecessary overhead, and direct communication with the scientists running your study. It also gives us the flexibility to respond quickly when the science calls for a change.
All animal studies are run at our U.S.-based facilities, helping protect your IP and keeping communication straightforward from study design through final report.
MEET OUR SCIENTIFIC DIRECTOR
Bret Stephens, PhD
Bret brings more than 20 years of in vivo biology and cancer drug-discovery experience spanning pharmaceutical and academic research.
At Rincon, Bret remains directly involved in study design and execution—part of our approach of giving clients direct access to the scientists responsible for their work.
Dr. Stephens received his PhD degree in Molecular Biology from the University of Arizona.
Previous to joining Rincon Bio, Dr. Stephens worked at Tolero Pharmaceuticals, Huntsman Cancer Institute (University of Utah), and the BioDesign Institute (Arizona State University), where he focused on cancer small molecule drug development.

Email: info@rinconbio.com
Tel: 760-713-6613
Utah:
3900 N Traverse Mountain Blvd
Suite 100
Lehi, UT 84043
California:
3156 Vista Way, Suite 220
Oceanside, CA 92056
