FDA Investigator

Dianna C Sonnenburg

Latest inspection on record: Thorp, United States, April 2015 · records back to 2010

Animal Drugs & FeedsFoods & Cosmetics

FDA inspection record · Last updated July 12, 2026

Overview

  • 172 inspections across 165 sites are on record.
  • 250 Form 483 observations are attributed to this investigator.
  • Most recent recorded activity is 2015-04-23.

At a glance

Inspections

172

Sites

165

Observations

250

Career since

Jul 2010

Recent inspections

Most recent inspections in the published record.

SiteDateCategoryForm 483
Zeist, Alson23 Apr 2015Animal Drugs & FeedsOn file
Neisius, Joe22 Apr 2015Animal Drugs & FeedsOn file
Augusta Feed Service, Inc20 Apr 2015Animal Drugs & Feeds
Wagner Dairy, LLC10 Apr 2015Animal Drugs & FeedsOn file
Cargill Incorporated1 Apr 2015Animal Drugs & Feeds

Sites inspected

Zeist, AlsonThorp, United States1 insp.
Neisius, JoeThorp, United States1 insp.
Augusta Feed Service, IncAugusta, United States1 insp.
Wagner Dairy, LLCLitchfield, United States1 insp.
Cargill IncorporatedBig Lake, United States1 insp.

Co-investigators

Investigators who share inspections with this person.

Courtney R Tiegs6 shared
Traci C Kelm3 shared

Full investigator report

Get the verbatim findings behind Dianna C Sonnenburg's 250 observations

Source 483 PDFs, verbatim observations, and how each site responded, so your team knows what they cite before they arrive.

  • New inspections and Form 483s, mapped to the CFR citation
  • Warning letter outcomes, and the citation patterns they repeat
  • Their co-investigators, so no surprises about who shows up on site