American Colloid Company a Minerals Technologies Company (ACC/MTI) is a leading, technology-driven specialty minerals company that develops, produces, and markets a broad range of mineral and mineral-based products, related systems and services. MTI serves a wide range of consumer and industrial markets, including household and personal care, paper, foundry, steel, construction and environmental solutions around the world. The company reported global sales of $2.1 billion in 2024.

ACC/MTI focuses on two major segments – Consumer & Specialties and Engineered Solutions. 

Our Consumer & Specialities segment offers technologically enhanced products to consumer-driven end markets plus specialty additives that become functional components in a variety of consumer and industrial goods. This segment includes our Household & Personal Care and Specialty Additives product lines. The Household & Personal Care product line provides mineral-to-market products that serve consumer-oriented end markets including Pet Care, Personal Care, Fabric Care, Edible Oil, and Renewable Fuel Purification. Our Specialty Additives product line provides mineral-based technologies serving Paper, Packaging, Sealants & Adhesives, Paint & Coatings, Ceramics, Plastics, Food & Pharmaceutical markets.

Our Engineered Solutions segment offers advanced process technologies and solutions that are designed to improve our customers’ manufacturing processes and projects. This segment includes our High-Temperature Technologies and Environmental & Infrastructure product lines. Our High-Temperature Technologies product line offers specially-formulated blends and technologies primarily for Foundry and Steelmaking industries. Our Environmental & Infrastructure product line provides waterproofing, water purification, remediation and other fluid management technologies for critical projects for Remediation, Water Purification, and Infrastructure.

ACC/MTI is committed to cultivating a diverse and inclusive work environment for all employees. In our offices around the world, our differences are respected and valued as essential to MTI’s continued growth and innovation. Our goal is to ensure that all employees at MTI experience our workplace as a welcoming and respectful environment where they can achieve their full potential.

Key Responsibilities:

Administrative & Clerical Support

• Submit invoice batches and ensure timely processing of vendor payments
• Record and organize financial statements and payment documents
• Answer incoming calls and assist suppliers with payment status or account inquiries
• File, scan, and maintain physical and digital records
• Research payment details, invoice dates, and banking information as needed
• Manage new supplier applications and process updates (e.g., banking, address, and email changes)

Cross Department Coordination

• Communicate with other departments regarding accounts payable needs
• Provide support to employees and departments with administrative tasks as requested
• Maintain and update equipment utilization and maintenance records

Qualifications:

Required:

• Strong computer skills, especially in Microsoft Outlook, Excel, and Word
• Excellent communication and organizational skills
• Ability to manage multiple tasks with accuracy and efficiency
• High level of integrity and professionalism when handling sensitive information
• Read, write, speak and understand English

Preferred:

• Prior experience in administrative or financial support roles
• Familiarity with vendor and supplier communications or invoice processing

Additional Information:

• Position is based in Belle Fourche, SD
• Flexible hours available within a Monday–Friday schedule
• MSHA training provided

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