**Main Responsibilities:** * Analysis and control of the **fuel purchase and sales** comparison file for suppliers and customers. * **Fuel invoicing** to customers through files and the Microsip system. * **Early invoicing** and issuance of **payment complements**. * **Control, updating, and tracking** of outstanding invoices. * **Organization, direction, coordination, and control** of all administrative and financial activities of the company. * **Control and recording** of payments (suppliers, payroll, expenses, and income). * **Preparation and payment** of weekly and monthly payroll for assigned personnel. * **Monitoring customer account statements** and collection control. * **Daily updating of databases** for sales, purchases, expenses, and income. * **Management, organization, and safeguarding** of customer invoice files. **Job Requirements:** * Bachelor's degree in **Administration, Accounting, Finance**, or related field. * **Minimum of 2 years' experience** in administrative, accounting, or billing areas. * Knowledge and experience with **Microsip** (desirable). * Knowledge of **electronic invoicing and payment complements** (CFDI). * Advanced **Excel** and database skills. * Ability to **analyze financial and sales information**. * Organizational skills, attention to detail, and ability to meet deadlines. * Proactive attitude, leadership, and effective communication skills. Employment type: Full-time Salary: $22,000.00 - $27,000.00 per month Benefits: * Savings fund * Company phone Work location: On-site