Microbiologist (1st Shift)

The Masterson Company, Inc.
Milwaukee, WI Full Time
POSTED ON 1/22/2022 CLOSED ON 3/18/2022

What are the responsibilities and job description for the Microbiologist (1st Shift) position at The Masterson Company, Inc.?

Family-owned for over 150 years Masterson Foods has a rich history and reputation as a quality supplier of premium sweet and savory food products. We are a recognized leader in supplying sweet and savory food products and customized manufacturing solutions to the restaurant, packaged ice cream, and contract manufacturing segments of the food industry. Our family owned company, through a process of continuous improvement and renewal, will exceed the expectations of our customers, employees, and community. We are committed to being a good neighbor, an attractive and ethical place to work, and an attentive supplier

We are currently looking for a Microbiologist (1st Shift). The Microbiologist is responsible, performing microbiological testing of manufactured products, the ingredients, and the environment following set procedures approved by the FDA. These tests ensure compliance to company, customer, and government microbiological standards.

Duties & Responsibilities:

  • Performs finished product microbiological testing (includes sample prep, testing, media prep., reading plates and data entry).
  • Environmental monitoring (swabbing, water sampling/testing, air exposures, investigating issues, etc.)
  • Preparation and sending of Customer Certificates of Analysis
  • Coordinates product holds, rejects and releases based on company procedures.
  • Verify incoming ingredient Certificates of Analysis
  • Sample incoming ingredients for testing
  • Assist in root cause analysis for quality issues on finished goods.
  • Isolates non-conforming product in accordance with established procedures.
  • Calibrates laboratory equipment at specified frequencies.
  • Participate in GMP audits of facility
  • Maintain inventory of supplies
  • Trains and mentors’ new hires, interns in quality procedures and equipment.
  • Reviews and updates SOP’s for in process lab procedures.
  • Trains and mentors’ new hires, interns in quality procedures and equipment.
  • Reviews and updates SOP’s for in process lab procedures.
  • Assists QA Lab Supervisor and QA Manager as needed
  • Adheres to all GMP, including sanitary requirements, Safety, Food Safety, and Standardized Work procedures.
  • Responsible for all aspects of safety, continuous improvement/efficiency improvement and adhering to policies and procedures.
  • Performs other duties as requested or assigned.


Required Qualifications:

  • Bachelor’s degree in food science or related field with one year of equivalent experience, which could be an internship, in food manufacturing is required.
  • Two to four years related experience and/or training; or equivalent combination of education and experience.
  • Knowledge of Good Laboratory Practices and aseptic microbiological techniques is preferred.
  • Better Processing Control School is Beneficial.


Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Masterson Foods is an equal opportunity employer. All applicants will be considered for employment without attention to age, race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.

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