Gi Group, in partnership with a leading car rental company, is looking for an Administrative Billing Officer (M/F/D) to join its team in Oeiras. This is a unique opportunity for those seeking professional growth in an environment that values the balance between personal life and work. Requirements: Education: 12th grade or higher; Minimum 2 years’ experience in similar roles (preferred); Proficiency in MS Office (mandatory) and IBM AS 400 (preferred); Intermediate-level Excel skills (mandatory); Experience in data processing and entry (mandatory); Knowledge of automotive maintenance (preferred); Knowledge of car rental and billing processes (preferred); Basic knowledge of billing and accounting (preferred); Strong results orientation and commitment to achieving objectives; Skills in telephone customer service and client interaction; Good organizational, planning, and interpersonal relationship skills; Customer-oriented mindset. Working hours: Monday to Thursday (9:00–17:30) and Friday (9:00–17:00). Benefits: Direct employment contract with the company; Base salary: €1000 gross per month; Meal allowance: €10–€20 (meal card); Hybrid work arrangement after 3 months (3 days office / 2 days remote); Apply now and become part of a team that invests in your future!