We are seeking an administrative assistant to work at a service-sector company located in Palma de Mallorca. The main responsibilities will include: * In-person customer service at the commercial office. * Handling complaints, billing, social vouchers, and incident management. * Cross-selling energy products, services, and telecommunications. * Marketing of air conditioning equipment and collaboration. * Acquisition of external collaborators (calls, mailing, visits). * Other duties inherent to the position. Part-time schedule of 35 weekly hours from Monday to Friday during morning shifts between 08:00 and 15:00, including legally mandated breaks. * Minimum of 6 months' experience in customer service or sales. * We are looking for a dynamic individual with empathy, a commercial attitude, and achievement-oriented mindset. * Proximity to the workplace is a plus. * Completed ESO education.\- Training in Marketing.\- Proficiency in office software.