Who is Aztalan Bio?

Aztalan’s story is just beginning, and you can be part of it!  ClonBio Group acquired Wisconsin’s largest ethanol plant in 2022 located in the village of Aztalan, just outside Jefferson, WI.  The facility will process 40 million bushels of locally grown feed corn per year, turning that into food-grade corn oil, vegetable protein concentrates and isolates for food applications, aquaculture feeds, renewable natural gas, organic fertilizer, ethanol, and dietary fiber for foods, among other things. 

Aztalan’s sister facility, Pannonia Bio in Hungary is one of the most technologically advanced grain biorefineries in the world.  Over the next several years, Aztalan will invest hundreds of millions of dollars into a biorefinery transformation every bit as innovative as Pannonia’s but uniquely suited to Wisconsin’s strengths.  Aztalan Bio is owned by ClonBio Group who is family-owned and invests in their people for long-term success.  We have a dedicated internal team of engineers and scientists from 23 countries and 5 continents, an investment in people that explains why ClonBio’s biorefineries are so technologically advanced. 

Position Overview

The Miller oversees the daily operation of the fractionation plant. Working a 12-hour rotating shift schedule while maintaining a safe work environment. Monitors and maintains production quality and equipment, while supporting the policies, goals, and objectives of the Company.

Duties and Responsibilities

  • Monitor the operation of the Mill to ensure requested quality and quantity produced.
  • Anticipate and solve problems in a timely manner and identify opportunities for improvement.
  • Troubleshoot, anticipate and correct problems associated with plant operations. May need to inspect different areas of the plant to locate problems.
  • Perform minor repairs to prevent damage to milling equipment.
  • Use visual analysis and test results to monitor all the product streams, ensuring a consistent and quality product output.
  • Document process variables, sample data and routine tasks as required for position, to ensure mill operations are maintained within operating parameters.
  • Monitor use and inventories of supplies.
  • Communicate with the lab to anticipate or remedy any problems to ensure the highest quality and optimize the facility’s efficiency.
  • Communicate with management and the maintenance department to anticipate or fix problems in a timely manner.  Prepare equipment to ensure it is safe for maintenance/contractors to perform scheduled work.
  • Handle chemicals according to the MSDS safety sheets.
  • Cross train with other operators to assure adequate coverage during unexpected interruptions in the plant.
  • Participate in projects that improve efficiency and/or reduce operating costs.
  • Perform scheduled Operations Work Requests as requested by Supervisor or Plant Management.
  • Participate in safety, health, and environmental programs (LOTO-lock out tag out, Safe Work Permit, FSMA-Food Safety Modernization Act). Participate in programs and procedures required to ensure safe work practices and plant cleanliness.
  • Perform other duties as assigned to maintain a safe, reliable, and consistent operation.


  • High School Diploma or GED required.
  • 0-2 Years’ relevant experience.
  • Associate degree in Milling Technology or equivalent is preferred.
  • Experience in a grain handling facility preferred.
  • Able to read, understand and follow standard operating procedures for operation of plant and associated equipment.
  • Basic computer operation and data entry skills.
  • Excellent communication, time management, multi-tasking, and problem skills.
  • Strong attention to detail.



  • 2-2-3 (Two on, two off, three on, two off, two on, three off)
  • Every other weekend is required
  • Hours rotate every six weeks between days and nights
  • 5:45am-6:00pm for six weeks then 5:45pm-6:00am for six weeks