Workplace Esparreguera Mission Ensure the proper administrative processing of contracts, ATRs (Technical Supply Conditions), and distributor-related procedures, guaranteeing the quality of billing processes, claims handling, and internal support to the commercial area. The main objective is to maintain accuracy, traceability, and operational efficiency across all administrative tasks related to customers and distributors. Reports to Back Office Manager Functions and Responsibilities Preparation, validation, and archiving of energy contracts (electricity and gas). End-to-end processing of ATR registrations, cancellations, and modifications in coordination with distribution companies. Administrative support for the monthly billing process and incident management. Comprehensive management of corporate email, including filtering and prioritizing requests from customers and distributors. Registration and tracking of commercial and technical complaints until resolution. Coordination with marketing and customer service teams to ensure smooth communication. Preparation of structured reports and activity summaries regarding administrative operations and service quality. Competencies **Proactivity and sense of responsibility:** anticipates incidents and proposes solutions. Resilience and adaptability under deadline pressure or external incidents. Effective communication and collaborative mindset. Integrity, organization, and commitment to team objectives. Attention to detail and continuous improvement orientation. Teamwork, coordinated with commercial, technical, and finance departments. Ability to organize multiple tasks methodically and prioritize effectively. Habit of structured reporting and documentary traceability. Proficiency in office software, especially Microsoft Excel (formulas, pivot tables, reports). Fluent use of internal management systems and CRMs. Knowledge of the Nemo system or similar energy transaction platforms is a plus. Ability to generate structured reports and maintain clean, up-to-date databases. Power BI knowledge is valued. Experience Minimum 3 years’ experience in similar roles within the energy sector (suppliers, consultants, or distributors). Education Higher Vocational Training Degree in Administration and Finance or equivalent qualification. Additional training in energy management, energy supply, or energy information systems is valued. Languages Spanish