Quality Assurance Specialist
Current
May 2024 - Present
AeroLeads people directory · profile
John Tien Email & Phone Number
Quality Assurance Specialist
at
89bio
1 work email found
@bayer.com
LinkedIn matched
✓ Verified July 2026
4 data sources
Profile completeness 100%
Current company
Role
Quality Assurance Specialist
Location
Castro Valley, California, United States
Who is John Tien? Overview
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Quick answer
John Tien is listed as Quality Assurance Specialist at 89bio, based in Castro Valley, California, United States. AeroLeads shows a work email signal at bayer.com and a matched LinkedIn profile for John Tien.
John Tien previously worked as Quality Assurance Release Specialist at Bayer and Quality Assurance Specialist at Bayer. John Tien holds B.S., Physiology from University Of California, Davis.
Company email context
Email format at 89bio
This section adds company-level context without repeating John Tien's masked contact details.
{first}.{last}@bayer.com
86% confidence
AeroLeads found 1 current-domain work email signal for John Tien. Compare company email patterns before reaching out.
Profile bio
About John Tien
John Tien is a Quality Assurance Specialist at 89bio. He possess expertise in change control, manufacturing, quality assurance, gmp, software documentation and 10 more skills.
Listed skills include Change Control, Manufacturing, Quality Assurance, Gmp, and 11 others.
Current workplace
John Tien's current company
Company context helps verify the profile and gives searchers a useful next step.
9 roles
John Tien work experience
A career timeline built from the work history available for this profile.
Quality Assurance Release Specialist
Mar 2023 - Sep 2023
Quality Assurance Specialist
Apr 2021 - Feb 2023
Senior Manufacturing Specialist
Jun 2009 - Jul 2010
Sr. Quality Engineer
Mar 2004 - Mar 2009
Mngr., Quality Assurance Systems
Apr 2003 - Mar 2004
Mngr., Process Validation And Change Control
Apr 2000 - Apr 2003
Engineering / Validation Support
Nov 1998 - Apr 2000
Manufacturing Supervisor
Nov 1994 - Nov 1998
1 education record
John Tien education
-
University Of California, Davis
FAQ
Frequently asked questions about John Tien
Quick answers generated from the profile data available on this page.
What company does John Tien work for?
John Tien works for 89bio.
What is John Tien's role at 89bio?
John Tien is listed as Quality Assurance Specialist at 89bio.
What is John Tien's email address?
AeroLeads has found 1 work email signal at @bayer.com for John Tien at 89bio.
Where is John Tien based?
John Tien is based in Castro Valley, California, United States while working with 89bio.
What companies has John Tien worked for?
John Tien has worked for 89Bio, Bayer, Bayer Healthcare, Xoma, and Berlex Biosciences.
How can I contact John Tien?
You can use AeroLeads to view verified contact signals for John Tien at 89bio, including work email, phone, and LinkedIn data when available.
What schools did John Tien attend?
John Tien holds B.S., Physiology from University Of California, Davis.
What skills is John Tien known for?
John Tien is listed with skills including Change Control, Manufacturing, Quality Assurance, Gmp, Software Documentation, Biotechnology, Fda, and Sop.
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