Mari Mendoza

Results-driven office Assistant and Accounts Receivable with over 8 years of experience in diverse administrative roles, skilled in billing, invoicing, and accounts management. Proficient in QuickBooks and adept in high-volume environments, demonstrating a keen attention to detail through successful management of payroll and vendor relationships. Notable achievement includes optimizing invoice processes at DTM Trucking, G&M Oilfield & Trucking, and Spur Vacuum.

Eager to leverage strong organizational skills to support operations effectively.

Accounts Receivable Specialist at Spur Vacuum (2025-09 – Present)

• Submit through Open Ticket and Open Invoice mainly for Exxon field tickets.
• Split invoices across multiple locations to flip / convert sales orders to invoices on Open Invoice, Open Ticket, Arriba SAP, Quickbooks and Gemini.

Accounts Receivable Clerk at GM OILFIELD & TRUCKING SERVICES (2025-01 – 2025-08)

• Checked field ticket GPS on GeoForce daily.
• Invoiced on QuickBook, submitted on IronSight and SAP Ariba for Apache and Oxy.
• Data entry billing produce, brine, and fresh water (hazmat pricing, OBM, WBM and direct billing knowledge)
• Coded invoices on Open Invoice/ Open ticket for companies such as Diamondback, Conoco, Exxon(Pioneer), and SM Energy.
• Organized weekly cost based by company man on Excel.
• Strong attention to detail used to find cost discrepancies on invoices.

Accounts Receivable Clerk at DTM Trucking (2022-05 – 2024-10)

• Managed billing for water hauling tickets, including brine, produced water, fresh water, frac gel, and OBM/WBM.
• Leveraged QuickBooks to generate sales orders, purchase orders, and invoices.
• Thrived in a high-volume invoicing environment, ensuring accuracy and efficiency.

Bank Teller at CITIZENS Federal Credit Union (2021-08 – 2022-05)

• Processed customer deposits and facilitated withdrawals.
• Administered loan payments and executed check scanning.
• Assisted during ATM replenishment and handled all teller operations.

Office Assistant at Tex-Zac Electric (2019-07 – 2020-09)

• Answered phones and generated job tickets.
• Organized job schedules and prepared invoices and weekly payroll.
• Collaborated with accounts payable and accounts receivable departments.

Office Manager at JV Electric (2017-03 – 2019-07)

• Oversaw payroll processing and managed accounts payable.
• Developed invoices and maintained strong vendor relationships.
• Liaised with the accountant to file state reports accurately.

Bookkeeping at Gruver State Bank (2014-02 – 2017-02)

• Rotated through various tasks within the Bookkeeping department.
• Processed deposits, cashed checks, and managed ACH payroll.
• Provided translation services for new account customers.

Associate in Science (AS) in Science – Amarillo College (2021-01 – 2023-05)