Location: Monahans, TX (onsite) | Schedule: Monday – Friday, 9:00 AM – 3:00 PM (subject to change based on business needs and Daylight Savings)

Reports to: Corporate HR Director (Mesa, AZ) with dotted line report to Operations Area Manager

FLSA Status: Part-Time Non-Exempt | Pay: Starting at $23.00/hour DOE

Company

At Rango, moving material isn’t just what we do. It’s what we’re built for. With deep expertise and years of hands-on experience, we operate like our machines: productive, efficient, and powerful. Since 2012, Rango has grown into a leading mining services company across the Southwest. We partner with mining and construction companies in sectors from aggregates to precious metals and industrial minerals. Our culture is fast-paced, supportive, and team-oriented — and we’re just getting started. Join Rango and be part of a crew that keeps things moving.

Position Summary

We are seeking a reliable and detail-oriented Part-Time Office Assistant to support daily administrative operations for a contract mining company in West Texas. This role is essential to maintaining an organized, efficient office environment while providing cross-functional support to the HR, Safety, Maintenance, and Operations teams. The ideal candidate brings a strong customer service mindset and thrives in a fast-paced industrial environment.

Key Responsibilities

Administrative & Office Support

• Answer and direct incoming calls
• Greet and assist walk-in visitors
• Maintain office supplies inventory
• Perform clerical duties (mail, invoicing, data entry, document management)
• Calendar management & scheduling support

Cross-Functional Support

• Support HR, Safety, Maintenance, and Operations teams as needed
• Assist with safety documentation and training records
• Support reporting and coordination tasks
• Provide various employee support as needed
• Assist with New Hire Orientation
• Ensure communication between field and office staff

Employee Engagement & Event Support

• Assist with employee events and recognition
• Support onboarding logistics and related employee communications including I-9 work authorization process, pre-employment/random drug testing, and New Employee Orientation activities including benefits overview presentations.

Qualifications

• High School Diploma or GED required

• 2+ years office experience preferred
• Strong organizational skills, attention to detail, and critical thinking skills
• Effective written and verbal communication skills
• Microsoft Office proficiency
• Ability to handle confidential information with appropriate discretion
• Customer-focused mindset and a comfort level juggling a variety of responsibilities and duties
• Previous mining, construction, or similar industry experience preferred

Work Environment & Physical Requirements

• Ability to sit or stand for extended periods
• Ability to bend, stretch overhead, and lift up to 20 lbs occasionally
• Operation of standard office environment including computers, printers, etc.
• Personal protective equipment is required when performing work in a mine, outdoor, manufacturing or plant environment, including hard hat, hearing protection, safety glasses, safety footwear, and as needed, respirator, rubber steel-toe boots, protective clothing, gloves, and any other protective equipment as required.
• Rango promotes a drug/alcohol-free work environment, mandatory pre-employment drug testing and on-going random drug testing as allowed by applicable state laws.