Completed training as Medical Documentation Assistant, Medical Documentarian, or Nurse Alternatively: Further training as Study Nurse, Clinical Research Associate (CRA), Clinical Trial Manager, or comparable professional experience Ideally certified Tumor Documentarian Proven experience in medical tumor documentation Sound knowledge in creating cancer registry reports Knowledge of Gießen Tumor Documentation System (GTDS/Web-GTDS) or comparable oncological documentation solutions is desirable Very good medical expertise in oncological diseases Proficient application of medical nomenclature and ICD-O and ICD-10 Basic IT skills (ideally Mac OS) and openness to new software solutions Proficient use of Google Workspace applications High stress resilience and ability to deliver high-quality work under pressure High reliability, communication skills, and team spirit