Meet Our Employees

Learn about the talented people at Gilead who are working to solve some of the world’s biggest healthcare challenges.

Daan Koper

Manager, Manufacturing Technical Services (MTS)
Technical Operations, Kite
Location: Hoofddorp, Netherlands
Joined Gilead: July 2019

In his role at our manufacturing facility in the Netherlands, Daan Koper leads a team of process engineers working to support the production of our cell therapies and help Kite, a Gilead Company, expand its capacity to provide cancer treatments to eligible patients across Europe and beyond. Learn how joining Kite enabled Daan to grow professionally.

Get to Know Daan 

Jessica Jirash Gebara

Jessica Jirash Gebara

General Manager, Gilead Mexico
Location: Mexico City, Mexico
Joined Gilead: February 2022

As the General Manager of our Mexico affiliate, Jessica Jirash Gebara is responsible for driving the company’s strategy in the country, engaging employees and helping increase access to Gilead’s medicines. Read about her perspective as a woman leader with two decades of industry experience and learn what inspired her to help expand our presence in Mexico.

Get to Know Jessica 

Tuba Zengin

Tuba Zengin

Global Medical Affairs – HIV
Location: Stockley Park, UK
Joined Gilead: February 2013

As a physician who began her Gilead career at our Turkey affiliate, Tuba Zengin brings several important perspectives to her current role on our Global Medical Affairs team in the UK. Learn how Tuba’s experience at Gilead has enabled her to continue working in her passion and expand her impact on HIV.

Get to Know Tuba 

Tashica Amirgholizadeh

Tashica Amirgholizadeh

Senior Associate General Counsel, IP
Location: Foster City, CA
Joined Gilead: May 2013

As a leader in our Legal organization, Tashica Amirgholizadeh shares her expertise with teams across Gilead to help protect the company’s intellectual property (IP). Find out how the former scientist came to work as an attorney at Gilead and hear what keeps her excited about her career and the company’s future.

Get to Know Tashica 

Mel Chiang

Chih-Yuan (Mel) Chiang

Senior Manager
Global Medical Affairs – COVID-19
Location: Taipei, Taiwan
Joined Gilead: August 2019

In his work on our Global Medical Affairs team, Mel Chiang helps educate healthcare providers on COVID-19 and serves as the global project manager for Phase 4 studies of Gilead’s antiviral for the treatment of COVID-19. Read about how he came to do this work, why he joined Gilead and what he’s gained from being in a global role at our Taiwan affiliate.

Get to Know Mel Chiang