Job Title: Preloader & Relief Operator

Why consider a career at MLC?

MLC was recognized by Newsweek as one of America’s Greatest Workplaces in 2025.

Highly collaborative work environment focused on growth and innovation
Safety and sustainability are top priorities
Excellent compensation, benefits, generous perks; focused on employee wellbeing
Great development and advancement opportunities
Bring your real self to work, come grow with us!

MLC operates the largest lime facility in the Americas and mines some of the purest limestone reserves in the world…and we are global! The company is committed to development and employee satisfaction. Join our outstanding team!

About the Job

The Preloader & Relief Operator position is an hourly position that is responsible for operating Pneumatic Trucks around the plant site, dropping and hooking up trailers to the tractor, loading trailers with Quicklime and Hydrated Lime for immediate delivery as well as preloading trailers for future pickup. This position is also responsible for operating the computer-controlled hydration system and related equipment and maintaining product quality by performing various lab testing when the Process Technician is not available.

Operate a tractor/trailer.
Load product into designated trailers.
Maintain a safe and clean working environment.
Must be able to get on top of trailers during loading process.
Operate a railcar mover, bobcat and forklift. Operate a trans loader to unload railcars into trailers.
Provide paperwork to the office on loaded trailers.
Communicate with the carriers and office to schedule loads.
Work with production crews as needed. Performs/Assists with Process Technician duties.
Perform other duties as assigned.

Required Qualifications

Education: High School Diploma or Equivalent required.
Experience: 1+ year of relevant experience required.
Skills: Proficient with a computer and strong communication. Simple math skills.
Licenses: Valid Driver’s License required.
Schedule: Willingness to work shift work and work some weekends.
Abilities: Must be able to climb ladders and stairs without a fear of heights.

The Fine Print

Benefits and perquisites may vary based on the nature and location of each job.

Click here for MLC EEO information

About MLC

MLC, headquartered in St. Louis, Mo., is a leading global supplier of high-calcium lime products and technical solutions. These offerings bring essential performance and value to a broad range of market applications, including metals, construction, chemical synthesis, water and emissions treatment, glass, textiles, plastics, rubber, agriculture, foods and beverages. With over a century in business, MLC has built a reputation on the quality of its products and services, as well as an unwavering commitment to safety, sustainability and service. The company’s expanding global footprint includes a diversified, reliable network of production and distribution facilities in the U.S., as well as in the UK through our Singleton Birch business. For more information, visit https://www.mlc.com/.

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