Jonathan Tsang is Focused on Optimizing CAR T-Cell Therapy Manufacturing to Help More Cancer Patients Around the World

Jonathan Tsang

Jonathan Tsang

Senior Director, Process Development
Manufacturing Sciences and Technology
Location: El Segundo, CA
Joined Gilead: October 2020

Jonathan Tsang, Senior Director, Process Development, is part of a team of scientists dedicated to continuously improving CAR T-cell therapy manufacturing at Kite, a Gilead Company. Learn about what makes this work so critical and why Jonathan thinks Kite is the most patient-focused company he's worked for during his many years in biopharma.

Q: What drew you to your field and how did you come to work at Kite?

I’m an engineer by training and I’ve been in biopharma for the past 17 years, at both large companies and small startups. I began my career at a small company, working to develop processes and performing technology transfers, including internationally in India. After that I joined a larger biotech company and was focused on helping provide treatments for hemophilia, a serious bleeding disorder. I fell in love with the idea of using my skills to help improve the lives of those facing serious diseases. I’m here at Kite now because I believe that biotechnology modalities like cell therapy will play an important role in how we will ultimately one day find a cure for cancer.

Q: What are you and your team working on?

We’re the process scientists who support the manufacturing of Kite’s CAR T-cell therapies, which train a patient’s immune system to recognize, attack and destroy certain types of cancer. Our team helps continuously improve the company’s manufacturing processes, solve any issues that arise and understand how new technology works. What excites us is helping to enhance a sustainable manufacturing operations model that is efficient and scalable so we can help as many patients around the world as possible.

Q: Tell us about a time you really felt the impact of your work.

With autologous CAR T-cell therapy, every single manufacturing batch represents an individual patient. We have a piece of that individual in our hands, and the gravity of that is not lost on any of us. This really hits home when we have meetings to discuss the challenging manufacturing batches and how to make them successful. The decisions we make in those moments can help ensure people are able to receive treatment and have a meaningful impact on someone’s life.

Q: How would you describe the company’s culture?

The culture at Kite, as well as at Gilead, is fast-paced, collaborative, innovative and patient-focused. In all my years in this industry, I’ve never seen an organization that is this dedicated to helping patients. I attribute this to the very personal nature of our work and how intently we focus on each individual’s cells. It’s hard not to feel a deep connection to these people.

Q: What is your impression of the opportunities for career growth at Kite?

Having worked at both small and large companies, I see this as the best of both worlds. Kite still has many elements of a startup in that we’re agile and fast-paced, and in Gilead, we also have the support of a more established company with a long track record of success. For me, this presents many opportunities to learn new technologies and processes and participate in interdisciplinary projects, which opens doors for personal and professional growth.

Visit to learn more about additional manufacturing roles at Kite.

Related Job Postings

United States - California - Foster City

United States - California - Foster City

Canada - Alberta - Edmonton

United States - California - Foster City

Meet More of Our Employees

Gilead employee Wayne Paul, HIV Medical Scientist, Australian Medical Affairs

Wayne Paul

Medical Scientist, HIV

Medical Affairs

Gilead employee Amanda Dang, Senior Research Scientist, Formulation and Process Development

Amanda Dang

Senior Research Scientist I

Formulation and Process Development

Gilead employee Jan Christmann

Jan Christmann

Senior IT Support Engineer

Information Technology