Administrative Assistant

Plains; Three Rivers (TX); On-site; USD 40,000 - 55,000; Full time

Benefits offered by this job

Medical / dental / prescription / vis​

401(k) plan

Paid time off

Job summary

Plains in Three Rivers, Texas seeks an organized Administrative Assistant to join our South Texas Trucking group. Reporting to the district manager, you will keep operations running smoothly by handling reports, invoices, filing, and coordinating supplies and travel.

You’ll support budgeting, scheduling, and onboarding activities while serving as the reception point for the site. The role requires a High School Diploma, at least two years of office experience, and proficiency with Microsoft

Qualifications

• Education: High School Diploma or equivalent.
• Minimum 2 years in administrative/office support.
• Proficiency in Microsoft Office and Excel; strong organizational skills.

Responsibilities

• Prepare and organize reports for budgeting and operations.
• Manage office correspondence, invoices, and filing.
• Order equipment and supplies to keep operations running.
• Maintain safety handbooks and assist with compliance.
• Coordinate training schedules and travel arrangements.
• Greet visitors and provide reception support when needed.

Skills

MS Office proficiency

Excel

Organizational skills

Attention to detail

Communication skills

Education

High School Diploma or equivalent

Tools

Microsoft Office Suite

Email Clients

Job description

Job Type

Regular

Plains is an industry-leading transportation and midstream provider specializing in transportation, storage, processing and marketing solutions for crude oil. We own an extensive network of pipeline transportation, terminalling, storage and gathering assets in key oil producing basins and transportation corridors and at major market hubs in the United States and Canada. The company is headquartered in Houston, Texas.

We’re on the lookout for passionate self‑starters who thrive in fast‑moving, collaborative, and innovative environments.

Plains is looking for an organized and adaptable Administrative Assistant to join our South Texas Trucking group in Three Rivers, Texas. Reporting to the district manager, you’ll have an opportunity to become a trusted partner who keeps our team running smoothly and efficiently while making a real impact.

Why You’ll Love This Role

• Variety & Challenge: No two days are the same. You’ll handle a wide range of responsibilities that keep our operations on track.
• Impact: Your work directly supports managers and teams, helping them focus on strategic priorities.
• Growth: Build your skills in reporting, compliance, and coordination while working with a collaborative team that values your contributions.
• Benefits: You’ll be eligible for company benefits including medical / dental / prescription / vision, 401(k) plan, paid time off, and other programs.

What You’ll Do

• Prepare and organize reports for budget forecasting, volume tracking, overtime, and other operational needs.
• Manage office correspondence, process invoices, and maintain accurate filing systems.
• Order equipment and supplies to keep operations running smoothly.
• Maintain safety handbooks and assist with compliance assurance.
• Ensure timesheets are accurate and submitted on time.
• Coordinate employee training schedules and travel arrangements.
• Serve as a welcoming point of contact at Reception when needed and route calls appropriately.
• Support facility upkeep and assist with special projects as assigned.

What We’re Looking For

• Education: High School Diploma or equivalent.
• Experience: Minimum 2 years in an administrative or office support role.
• Skills: Proficiency in Microsoft Office (especially Excel), strong organizational and multitasking abilities, and excellent attention to detail.
• Attributes: Analytical thinker, proactive problem solver, and effective communicator who can interact confidently with internal teams and external partners.

Additional Requirements

• Valid driver’s license with a clean abstract.
• Ability to pass background checks and comply with drug and alcohol policy, including pre‑employment D&A testing.
• Satisfactory professional references.
• Must be authorized to work in the U.S. (visa sponsorship not available).

#Plains

At Plains, our employees are our most valuable asset. Hard work is rewarded with competitive compensation and a top-tier benefits program designed to keep our employees safe, healthy and happy. We work hard to deliver the best results to our stakeholders, and we also respect our employees' need for personal and family time, which is reflected in our benefits program.

We are proud to be an Equal Opportunity Employer. We are committed to providing employment opportunities to all qualified individuals, without regard to age, race, color, national or ethnic origin, religion, sex, sexual orientation, gender identity or expression, veteran status, genetic information, disability, or any other characteristic protected by federal, state, or local law. Applicants with disabilities can request accessible formats, communication supports, or other accessibility assistance by contacting [e-mail].