Job Summary: We are seeking a methodical and detail-oriented Billing Administrator who is proactive, dynamic, analytical, and goal-oriented, focused on achieving objectives and results for TREBOL ENERGY GROUP. Key Highlights: 1. Continuous professional development and expansion of knowledge in the energy sector. 2. Flexible working hours to balance professional and personal life. 3. Collaborative work environment with team-building activities. We are TREBOL ENERGY GROUP, an energy business consultancy founded in 2012 and headquartered in Sant Joan Despí. We manage over €500 million in energy billing, helping companies, multinational corporations, and public administrations procure energy in the most intelligent way—always prioritizing energy savings. We design customized solutions to ensure optimal energy management outcomes, from wholesale market procurement to energy-saving measures, billing control, and auditing. Our energy consultancy employs 90 professionals and is currently undergoing rapid expansion. Therefore, we seek talented individuals—both technically skilled and competently equipped—who are motivated by this innovative sector and wish to further develop their careers with us. We are looking for a methodical, detail-oriented candidate to join us as a Billing Administrator. The selected candidate will be based at our offices in Sant Joan Despí (Barcelona). Competency-wise, we require someone proactive, dynamic, discerning, and analytical—oriented toward objective achievement and delivering optimal results. Billing Issuance and Registration; Collections Management; Document Management; ERP/Odoo; ERP Operations Creation; Settlements Issuance and Management; Channel Control * 3 years’ experience. * Higher Vocational Training Diploma (FP de Grado Superior). * Competencies / Knowledge: Proficient Excel skills. Higher Vocational Training qualification in Administration and Finance or equivalent. Demonstrable experience in collections control and administrative management. Strong telephone communication skills. * Indefinite-term employment contract. * Full-time position. * Additional relevant information: We are a company committed to our people and fully support their needs to foster talent within our organization. To achieve this, we offer: \- Continuous professional development, with opportunities to broaden your expertise in the energy sector. If you wish to explore other facets of our business, we will involve you in diverse experiences to understand our full range of processes. \- Flexible working hours (start and end times) designed to support work-life balance. \- Flexible remote work arrangement (6 days per month) adapted to your personal needs. \- Flexible compensation package (transport and meal cards, private health insurance, discount platform, etc.). \- Collaborative work environment with team-building activities and social events.