Working At Ossium

Who We Are

At Ossium, we believe that science is humanity’s best weapon in the fight against disease, and we embrace the challenge of mobilizing the world’s healthcare ecosystem to win that fight. In pursuit of this goal, we empower our employees, maintain the highest standards of excellence, and are a force for good.

Kevin Caldwell

CEO, Co-Founder & President

Listen to Kevin Speak About Our Vision


The values we live by


We are mission-driven and results-oriented. We believe that a healthier world is a better one and that our work should drive positive change.


Embracing the truth empowers us to learn from both our successes and our mistakes. We follow the data wherever it leads.


We hold ourselves and each other to the highest bar. We care deeply about the work we do and know that even the smallest details can make a difference.

Inside Look

Day in the Life

Donor Field Services Managers

These donor tissue recovery experts work with our OPO partners to continuously improve our tissue recovery processes.  They are masters of Ossium’s recovery protocols and practices.

Production Associates

These processing experts make our cell therapy products. They are skilled in tissue processing, cell processing, and cryopreservation.

Clinical Trial Project Managers

These project management maestros ensure that our clinical trials are run with diligent care.  They work with clinical investigators and healthcare institutions to manage our research.

Words from the Team

I really appreciate that Ossium has challenged me in ways that totally throw me out of my comfort zone. It's a wonderful place to learn and grow.

Brian Johnstone

Vice President, Research

Brian Johnstone

Vice President, Research

For the past 20 years, Dr. Johnstone has been actively involved in translating adult stem cell therapies into treatments for a host of diseases affecting the major organs of the body. In 2004, he co-authored one of the first studies demonstrating the potential for treating cardiovascular diseases with novel adult stem cells isolated from fat.

Since then, Dr. Johnstone has continued to develop and test new medical uses for adult stem cells as part of his own research as well as in collaboration with international academic centers and pharma / biotech firms.

Outside of the research setting, Dr. Johnstone co-founded NeuroFx, an early-stage biotech firm developing a novel therapy for neurological disorders. Dr. Johnstone led the R&D program at NeuroFx for two years, where he was directly responsible for preclinical and chemistry, manufacturing, and controls development activities. He continues to act as an advisor for NeuroFx. Additionally, Dr. Johnstone has formed two other biotech companies, Chemigen, which is developing a small molecule drug for treating Lou Gehrig’s disease, and EmphyMab Biotech (now Allinaire), which is developing biologics to treat serious lung diseases.

Before becoming an entrepreneur, Dr. Johnstone was an early employee at Sangamo Biosciences for 6 years, where he managed the preclinical development program for their lead gene therapy candidate for cardiovascular diseases, which is currently in Phase II clinical testing. Dr. Johnstone received his Ph.D. from the University of Maryland, College Park, and completed a postdoctoral fellowship at the University of California, Los Angeles.

What’s exciting about where we are at this time is that the regulatory space is new; the path and challenges ahead of us are just beginning. And our amazing team – they have the entrepreneurial spirit and drive to make it happen. I love it.

Oliver Cácananta

Senior Director, Regulatory Affairs

Oliver Cácananta

Senior Director, Regulatory Affairs

Mr. Cacananta is a 25-year veteran of the biopharmaceutical industry, having worked broadly with biologics, combination medical devices, and small molecule drugs. He has extensive involvement in collaboration or leadership of approved marketing and investigational regulatory filings (BLAs, MAAs, PMA, CE Mark, 510(k), NDA, INDs/IDEs as well as CMC and other pre- and post-approval commitment submissions) and in organizing and participating in various agency interactions (e.g., PDUFA meetings and advisory panel). His global experience spans multiple therapeutic areas, including vaccines for influenza and biodefense medical countermeasures, diabetes and other metabolic disorders, endovascular disease, blood pathogen reduction technologies, and cell therapy for ophthalmology and medical aesthetics, and diverse geographies, working with partners and agencies across North America, Europe, Asia-Pacific (primarily China, Japan, and Australia), South America, and Middle East-North Africa.

Mr. Cacananta’s career and contributions to research and science are rooted in the intersections of the biotech and pharmaceutical industry and the quality and regulatory pathways by which treatment and technological innovations reach patients. As a regulatory professional, his impact comes from shepherding research products through the product lifecycle, from clinical trials to market approval, all the while ensuring that products are safe and efficacious and are within the regulatory parameters set forth by governing agencies.

Mr. Cacananta has worked at a variety of large and small biotechnology companies, including Lineage Cell Therapeutics, Cerus Corporation, Medtronic, Amgen, Emergent BioSolutions, BioMarin Pharmaceuticals, and Chiron Corporation. He received his BS in Biological Sciences from California State University, East Bay, and MBA in Global Management from the University of Phoenix.

It is incredible to see Ossium growing and changing before your eyes. The tremendous achievements are owed to the unmatched leadership and to every single hardworking team member. The team's passion and drive to save lives radiates through the daily work. People at all levels are heard, supported, and make a recognizable difference. Each Ossie inspires me to be better and work harder. Working at Ossium is more than a job - it is a challenge, it is a family, it is fulfillment, it is world-changing.

Aubrey Sherry

Manager, Quality Systems

Aubrey Sherry

Manager, Quality Systems

Open Positions

At Ossium, we’re always looking for talented, mission-driven people.

General Application

We’re always looking for talenting individuals who belive in our core mission. Don’t hesitate to fill out the General Application — we’ll find something for you to do!

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