Start Free Trial
Pricing
Log In
Log In
Upgrade browser for full Crunchbase experience. You're accessing Crunchbase in a browser that is no longer supported.
Learn More
Photo of Jeff Jonker
Person

Jeff Jonker

Overview

Edit Overview Section
CB Rank (Person) 24,166
Jeff Jonker is based out of South San Francisco, California, and is the President & Chief Operating Officer of Xaira Therapeutics. Jeff previously worked at Ambys Medicines as a President, CEO, and Board of Directors. Jeff Jonker attended Claremont McKenna College.

Jobs

Edit Jobs Section
Number of Current Jobs 1
Number of Past Jobs 1
Jeff Jonker is the President & Chief Operating Officer at Xaira Therapeutics. Additionally, Jeff Jonker has had 1 past job as the President and CEO at Ambys Medicines.
Organization Name  
Title At Company  
Start Date  
End Date  
Ambys Medicines Logo
Ambys Medicines
President and CEODec 2018—

Board and Advisor Roles

Edit Board and Advisor Roles Section
Number of Past Board & Advisor Roles 1
Organization Name  
Title At Company  
Start Date  
End Date  
Ambys Medicines Logo
Ambys Medicines
Board of DirectorsDec 2018—

Related Hubs

Edit Related Hubs Section
Hub Name  
CB Rank (Hub)  
Health Care Companies With More Than 100 Employees (Top 10K) Logo
Health Care Companies With More Than 100 Employees (Top 10K)
673
Health Care Companies With More Than 50 Employees (Top 10K) Logo
Health Care Companies With More Than 50 Employees (Top 10K)
583
Western US Early Stage Companies With More Than 50 Employees Logo
Western US Early Stage Companies With More Than 50 Employees
41,269
San Francisco Bay Area Early Stage Companies With More Than 10 Employees Logo
San Francisco Bay Area Early Stage Companies With More Than 10 Employees
28,128
Startups Founded in 2023 (Top 10K) Logo
Startups Founded in 2023 (Top 10K)
4,194
Health Care Companies (Top 10K) Logo
Health Care Companies (Top 10K)
160
Therapeutics Early Stage Companies With Fewer Than 1000 Employees Logo
Therapeutics Early Stage Companies With Fewer Than 1000 Employees
55,141
Artificial Intelligence (AI) Early Stage Companies With More Than 100 Employees Logo
Artificial Intelligence (AI) Early Stage Companies With More Than 100 Employees
35,715
California Early Stage Companies With More Than 100 Employees Logo
California Early Stage Companies With More Than 100 Employees
51,703
United States Early Stage Companies With More Than 50 Employees Logo
United States Early Stage Companies With More Than 50 Employees
27,966

Education

Edit Education Section
Jeff Jonker studied at Columbia Law School, Claremont McKenna College, and  University of St Andrews.

Recent News and Activity

Edit Recent News and Activity Section
There is no recent news or activity for this profile.
Who We Are
What We Do
Helpful Links
AI Content may contain mistakes and is not legal, financial or investment advice. Learn more.
Terms of Service | Privacy Policy | Sitemap | © 2026 Crunchbase Inc. All Rights Reserved.
(5eb04bf 1)
|