Job Summary: We are seeking an administrative professional with billing experience and customer service expertise to manage documentation, resolve incidents, and support a growing team. Key Highlights: 1. Opportunity for professional development in a global and diverse company. 2. Continuous training and improvement in an inclusive environment. 3. Collaboration within a team committed to sustainability and innovation. ALS is a global leader in analytical and laboratory services, committed to delivering high-quality, precise solutions to clients across diverse industries. With over 40 years of experience, we offer a broad range of services including testing, analysis, and technical consulting in areas such as mining, environment, food, energy, and others. Our mission is to provide reliable results that help our customers make informed decisions, driving sustainability, safety, and innovation in their operations. At ALS, we value integrity, excellence, and collaboration, and strive to create an inclusive and diverse workplace where every team member can contribute to collective success. As part of our team, you will have the opportunity to develop professionally within a company committed to continuous improvement and making a positive impact on society and the environment. We require a person with an administrative profile for the billing area and strong customer service skills to join our Salamanca team. **Main Responsibilities:** * Management of billing-related documentation * Advanced proficiency in Excel and its tools * Contacting customers to resolve incidents, complaints, and address inquiries * Consistent invoicing * Telephone and email communication management **Requirements:** * Intermediate-level education or vocational training (FP) in Administration or related field * Prior experience in administrative tasks (experience in Billing is advantageous) * Proficiency in office software (Excel, Word), billing systems, and new technologies (AI, Office 365, etc.) * Organizational ability, attention to detail, and teamwork skills * Intermediate English proficiency (desirable) * Immediate availability to start * Flexibility in working hours during closing days * Strong customer service orientation and teamwork skills Employment Type: Full-time Benefits: * Support for professional development * Offered language courses * Company events * Training program Work Location: On-site employment