The care of critically ill oncology patients requires complex, multidisciplinary management, and advanced practice providers (APPs) now perform many key intensive care procedures. In the ICU (intensive care unit), APPs routinely conduct central venous and arterial line placement, endotracheal intubation, bronchoscopy, and ultrasound-guided procedures, applying careful risk assessment in patients with thrombocytopenia, coagulopathy, and high infection susceptibility. Advanced gastrointestinal interventions, such as feeding tube placement, paracentesis for malignant ascites, and endoscopic or stent-based therapies, aim to support nutrition and manage treatment-related complications. Neurologic procedures, including lumbar puncture, intrathecal chemotherapy administration, and plasmapheresis, remain essential for central nervous system involvement and paraneoplastic syndromes. Structured training, simulation-based competency development, and adherence to evidence-based guidelines enhance procedural safety, particularly for high-risk tasks like intubation in patients with reduced physiologic reserve. Across all interventions, infection prevention strategies, ultrasound guidance, and shared decision-making promote high-quality, patient-centered care as APP roles continue to expand within oncologic critical care.