Dr. Ramdorai initially worked in the areas of algebraic theory of quadratic forms and arithmetic geometry of elliptic curves.

[5] Together with Coates, Fukaya, Kato, and Venjakob she formulated a non-commutative version of the main conjecture of Iwasawa theory, on which much of the foundation of this important subject is based.

[7] She holds an adjunct professorship position at Indian Institute of Science Education and Research, Pune.

Sastry, Sujatha Ramdorai conceived of and partially funded the Ramanujan Math Park in Chittoor, Andhra Pradesh, which was inaugurated at the end of 2017.

The park is dedicated to mathematics education and honors the great Indian mathematician Srinivasa Ramanujan (1887-1920).