Kasturi is the Group CEO and Director of Hemas Holdings PLC. With the mission to help families live healthfully, Hemas operates primarily in the Consumer Goods, Healthcare, and Mobility sectors. A publicly listed corporation, Hemas employs over 5000 people, with operations in Sri Lanka, India, Bangladesh, and Myanmar. Kasturi is the first female CEO of a publicly listed corporation in Sri Lanka.

She is also the President of the Sri Lanka Chamber of the Pharmaceutical Industry, and serves on the committee of the Ceylon Chamber of Commerce. Kasturi is also a Non-Executive Director of Capital Alliance Limited, and a Board Member of several other Hemas subsidiaries in the Healthcare and Consumer sectors.

Kasturi is a Fellow of the Chartered Institute of Management Accountants, and is an alumni of the Senior Executive Leadership Program at the Harvard School of Business.