[1] After initial training in her native city she relocated to London to study at the Guildhall School of Music and Drama.

One of her most notable appearances was across Europe in The Marriage of Figaro, conducted by Sir Georg Solti.

She has also given concerts in the Royal Opera House, Covent Garden, and as part of The Proms in England, and abroad in Amsterdam, Athens, Berlin, Halle, Helsinki, Hong Kong, Cologne, Leipzig, Madrid, New York City, Paris, Riga, Rouen, Strasbourg, Vienna, Winterthur and Zürich.

Rozario is currently a professor at the Royal College of Music[2] and Trinity Laban[3] where she is a member of the Vocal Faculty.

In 2013, she was awarded the Pravasi Bharatiya Samman by the President of India, Pranab Mukherjee, in recognition of her "outstanding achievements".