Night Shift Plant Operations Tech

Hydrate Operator

MLC was recognized by Newsweek as one of America's Greatest Workplaces and received an Eco Vadis Sustainability Rating for our continued commitment to sustainability.

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!

MLC offers a competitive and thoughtfully designed rewards package that supports both financial security and long-term career development:

401(k) Plan:
The company matches a portion of employee 401(k) contributions and also provides an additional employer-funded contribution, regardless of employee participation, to help support long-term retirement savings.

Tuition Reimbursement:
Reimbursement for 100% of approved eligible education expenses after six months of employment to support continued learning and career advancement.

Vacation and Holiday Pay:
Employees receive paid vacation as well as recognized company-paid holidays to support work-life balance throughout the year.

Health Savings & Wellness Benefits:
Employer HSA contributions for medical plan participants, a comprehensive wellness program, and $100 annually toward a gym membership.

Disability & Employee Assistance Coverage:
Company-provided disability insurance and access to an Employee Assistance Program (EAP) offering mental health, financial, and personal support resources.

Incentive Program:
Eligibility for performance-based incentive opportunities aligned with individual and organizational success.

Career Growth & Development Opportunities:
Access to professional development resources and opportunities within a growing, global organization.

Coming soon…Student Loan Reimbursement assistance

As a Hydration Plant Operator, you will play a key role in producing high-quality lime products by operating and maintaining computer-controlled hydration systems, ensuring safe operations, meeting quality standards, and supporting efficient plant performance.

Operate and monitor computer-controlled hydration systems and associated equipment

Perform quality tests and process checks to ensure products meet specifications

Load finished product for customer shipment by rail or truck; generate BOLs and shipping records

Maintain raw material and supply inventories, including purchase order requests

Perform preventive maintenance, troubleshooting, and minor repairs on plant equipment

Monitor dust control systems and support environmental compliance requirements

Maintain accurate production, shipping, and operator records in computerized systems

Uphold safety, housekeeping, and operational excellence standards across the facility

High School Diploma or equivalent

Minimum of three (3) years experience in an industrial or manufacturing environment

Ability to work night shift and respond to call-ins as needed

Knowledge of electrical and mechanical maintenance

Experience working in a chemical or chemical processing plant

Experience with computer-controlled or automated process systems

Proficiency with computers, keyboarding, and Microsoft Windows

Strong written and verbal communication skills

Forklift, telehandler, or mobile equipment operation experience

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

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