Plant Laborer Jobs in Rialto, CA (NOW HIRING)

Minerals Technologies Inc. is a global, technology-driven specialty minerals company that develops, produces, and markets a wide range of minerals and mineral-based products and services.

Our products are an essential part of everyday life for millions of people around the world. They are used in consumer goods in paper and packaging, food and pharmaceuticals, household and personal care, pet care, automotives, and many more, as well as in industrial settings like steelmaking, metalcasting, construction, infrastructure, and wastewater remediation.

We are listed on the New York Stock Exchange under the ticker symbol MTX, headquartered in New York City, and have over 150 locations worldwide, with ~4,000 employees in 34 countries and 12 R&D centers.

We put people at the center of everything we do -- working safely, communicating openly, and managing our resources and businesses responsibly.

Company: Specialty Minerals Inc., a Minerals Technologies company, is the largest supplier and global leader in providing Precipitated Calcium Carbonate (PCC) and Ground Calcium Carbonate (GCC) specially designed for customers' application needs.

Position: Plant Admin & Warehouse Associate

Location: Lucerne Valley, CA

Compensation: $29.00 - $32.00 per hour

What We Offer:

• Competitive pay, commensurate with experience
• Health/Dental/Vision plans
• 401k company match
• Life Insurance
• Short Term Disability & Long-Term Disability
• Educational Assistance
• Employee Assistance Plan
• Vacation Pay, Holiday Pay, Personal Days, and Sick Days
• This position is overtime eligible and we offer quarterly plant incentives

Job Summary

The Plant Admin & Warehouse Associate performs a combination of administrative, inventory management, and warehouse support functions to ensure the efficient operation of production, packaging, and mining activities. This role supports purchasing, invoicing, and asset management processes utilizing Oracle and Microsoft 365 tools. The position plays a critical role in maintaining operational continuity, inventory accuracy, and a safe, organized work environment aligned with MTI's safety culture.

Administrative & Financial Support

• Manage invoicing processes, including recurring invoices, discrepancy resolution, and coordination with corporate purchasing and accounting teams
• Support receiving processes and resolve pricing or billing discrepancies
• Track and manage facility utility expenses
• Purchase and maintain office supplies
• Manage incoming and outgoing mail, including packaging and shipping of light freight 

Inventory & Warehouse Operations

• Maintain inventory levels for fuel (gasoline, diesel, propane) and critical materials
• Operate forklifts and other mobile equipment to load, unload, and move materials
• Maintain spare parts inventory and recommend appropriate stock levels
• Issue and track MRO inventory using company systems

Systems & Data Management

• Create, update, and maintain inventory and transactional records in Oracle
• Utilize Microsoft 365 (Excel, Word, PowerPoint) to track, analyze, and report data
• Record and maintain labor and operational data from work shifts
• Review documents prepared by team members for accuracy and completeness

Communication & Coordination

• Act as a liaison across departments to ensure timely and accurate distribution of materials, data, and information
• Communicate effectively with internal teams, suppliers, and corporate partners
• Provide cross-functional support and coverage during employee absences

Continuous Improvement (OE/Lean)

• Participate in continuous improvement initiatives, including 5S, Kaizen, TPM, Daily Management, and Standard Work
• Assist in developing and following standardized processes
• Identify opportunities to improve efficiency, accuracy, and inventory control

Safety & Culture

• Perform all work in accordance with company safety policies and MSHA regulations
• Actively promote and support a positive safety culture
• Demonstrate leadership through safe work practices, teamwork, and a positive attitude

Additional Responsibilities

• Perform other duties and special projects as assigned

The requirements listed in the sections that follow are representative of the knowledge, skills and/or abilities required to perform the duties of this job. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions (primary duties) of the job.

Required Qualifications

• High school diploma or equivalent
• Minimum of 5 years of administrative experience
• Proficiency in Microsoft 365 (Excel, Word, PowerPoint)
• Experience working with inventory systems or ERP software (Oracle preferred)
• Strong organizational and time management skills
• Ability to work independently and manage multiple priorities

Preferred Qualifications

• Experience in a mining or industrial environment
• Forklift certification (or ability to obtain certification)
• Knowledge of purchasing, invoicing, and accounting processes

Core Competencies

• Attention to detail and accuracy
• Problem-solving and error identification
• Effective communication and interpersonal skills
• Ability to prioritize and meet deadlines
• Adaptability and flexibility in a dynamic work environment
• Strong work ethic, integrity, and accountability

Physical Requirements

• Ability to stand, walk, bend, squat, climb, and lift up to 50 pounds occasionally
• Ability to operate mobile equipment and perform repetitive motions
• Manual dexterity and visual acuity required
• Ability to work in confined spaces and varying environmental conditions

Work Environment

• Industrial and mining environment with exposure to dust, noise, weather, and temperature variations
• Work performed both independently and in team settings
• Regular proximity to operating equipment and machinery

Work Schedule

• Must be able to work flexible hours as needed, including overtime, weekends, and holidays
• Respond to call-ins as required to support operations

Safety & Training

• Complete all required MSHA and company safety training, including equipment operation, hazard communication, and emergency response
• Participate in refresher and ongoing training as required
• Follow all safety procedures, including use of required personal protective equipment (PPE)

Additional Expectations

• Demonstrate initiative, accountability, and sound judgment
• Maintain professionalism when interacting with internal and external stakeholders
• Follow all company policies, procedures, and safety standards

Federal Applicant Information