Dr. Sangeetha specialises in treating cancers and certain noncancerous conditions utilising advanced radiation techniques, including stereotactic radiotherapy. She possesses a fellowship in the Royal College of Radiologists (FRCR) and the Royal College of Physicians (FRCP). Furthermore, she is a member of several distinguished medical institutions, including the European Society of Therapeutic Radiation Oncology (ESTRO), the Royal College of Radiologists (RCR) and the American Society for Radiation Oncology (ASTRO).

Additionally. Dr. Ponnusamy is licensed to practice by both the General Medical Council, UK, and the UAE Department of Health (DoH).