An anesthesiologist's responsibilities include administering anesthesia during surgery, monitoring patients' vital signs throughout the procedure, alleviating acute or chronic pain, collaborating with surgeons and other medical staff, and overseeing patients' recovery after surgery. They use complex medical equipment, monitors, and drugs to manage patients' pain levels during operations. Anesthesiologists also conduct research to advance treatment and undertake certification and licensing requirements involving years of undergraduate study, medical school, and residency training across various medical fields.