Kalaiselvi is a director of Infinitus Law Corporation.

She graduated with honors from the University of London in 1993 and was called to the English Bar in 1994. She was subsequently admitted to the Singapore Bar in 1995 and brings 30 years of extensive legal experience to her practice. Since 2007, she has been actively engaged in advising and working with government agencies.

Having initially trained in litigation, Kalaiselvi has extensive experience across various areas, including commercial and corporate litigation, family law, accident and insurance claims, real estate disputes, Strata Titles Board proceedings, and intellectual property litigation, enforcement, and prosecution.

Currently, Kalaiselvi focuses her practice on corporate and commercial law, with particular expertise in mergers, acquisitions, investments, and commercial agreements. She regularly provides advice on matters related to wills and probate, as well as immigration and employment law.

In addition to her professional memberships, she is dedicated to serving the community and volunteers her legal expertise at the legal clinic organized by the Marymount Constituency.

Kalaiselvi is a member of the Law Society of Singapore and the Singapore Academy of Law.