Jeff Jonker
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Jeff Jonker Email & Phone Number

President and COO at Xaira Therapeutics
Location: South San Francisco, California, United States 15 work roles 3 schools
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✓ Verified Jun 2026 3 data sources Profile completeness 86%

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Current company
Role
President and COO
Location
South San Francisco, California, United States
Company size

Who is Jeff Jonker? Overview

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Quick answer

Jeff Jonker is listed as President and COO at Xaira Therapeutics, a company with 174 employees, based in South San Francisco, California, United States. AeroLeads shows a matched LinkedIn profile for Jeff Jonker.

Jeff Jonker previously worked as CEO at Belharra Therapeutics and Board Member at California Life Sciences Association (Clsa). Jeff Jonker holds Jd from Columbia Law School.

Company email context

Email format at Xaira Therapeutics

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Xaira Therapeutics

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Profile bio

About Jeff Jonker

Jeff Jonker is a veteran biotech executive and board member with decades of industry experience in operational, strategic, business development and legal roles across public and private companies. He excels at building teams and growing companies. Jeff is currently senior advisor to Ambys Medicines, where he was previously President and CEO. Immediately prior to Ambys, he served as President of NGM Biopharmaceuticals (NASDAQ: NGM) where he helped secure a groundbreaking partnership with Merck, grow the organization into a fully integrated clinical development company and expanded the company’s robust pipeline to include programs in immuno-oncology, retinal, liver and metabolic diseases. Prior to joining NGM, Jeff was Senior Vice President, Corporate and Business Development at Theravance Biopharma (NASDAQ: TBPH) and held that same role at Theravance, Inc. (NASDAQ: THRX) prior to completing the spin-out of TBPH and creation of Innoviva, Inc. (NASDAQ: INVA). He previously served as Chief Business Officer of Satori Pharmaceuticals, Vice President of Business Development and Corporate Strategy for Gloucester Pharmaceuticals prior to its acquisition by Celgene (NASDAQ: CELG), and in multiple leadership positions in the business development and legal groups at Genentech. Prior to Genentech, Jeff was a member of the Technology Transactions Group at Wilson, Sonsini, Goodrich & Rosati, representing clients in the life science and high tech industries. Jeff sits on the boards of Metacrine, Inc. (NASDAQ: MTCR) and the California Life Sciences Association.

Current workplace

Jeff Jonker's current company

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Xaira Therapeutics
Xaira Therapeutics
President and COO
South San Francisco, CA, US
Website
Employees
174
AeroLeads page
15 roles · 29 years

Jeff Jonker work experience

A career timeline built from the work history available for this profile.

Board Member

San Diego, California, US

Mar 2021 - Mar 2023

Senior Advisor

South San Francisco, California, US

Jul 2020 - Mar 2022

President And Ceo

South San Francisco, California, US

Nov 2018 - Jun 2020

Senior Vice President, Corporate And Business Development

South San Francisco, CA, US

2013 - 2014 ~1 yr

Chief Business Officer

Satori Pharmaceuticals
2010 - 2013 ~3 yrs

Vice President, Bd And Corporate Strategy

Gloucester Pharmaceuticals
2009 - 2010 ~1 yr

Director, Business Development

South San Francisco, California, US

2003 - 2009 ~6 yrs
3 education records

Jeff Jonker education

Jd

Columbia Law School

M.Litt., International Security Studies

University Of St Andrews

Ba

Claremont Mckenna College
FAQ

Frequently asked questions about Jeff Jonker

Quick answers generated from the profile data available on this page.

What company does Jeff Jonker work for?

Jeff Jonker works for Xaira Therapeutics.

What is Jeff Jonker's role at Xaira Therapeutics?

Jeff Jonker is listed as President and COO at Xaira Therapeutics.

Where is Jeff Jonker based?

Jeff Jonker is based in South San Francisco, California, United States while working with Xaira Therapeutics.

What companies has Jeff Jonker worked for?

Jeff Jonker has worked for Xaira Therapeutics, Belharra Therapeutics, California Life Sciences Association (Clsa), Metacrine, Inc., and Ambys Medicines.

How can I contact Jeff Jonker?

You can use AeroLeads to view verified contact signals for Jeff Jonker at Xaira Therapeutics, including work email, phone, and LinkedIn data when available.

What schools did Jeff Jonker attend?

Jeff Jonker holds Jd from Columbia Law School.

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