Ms. Buch has served as Whole Time Member, SEBI till October 04,2021. She has handled Market Regulation Department, Market Intermediaries Regulation & Supervision Department, Integrated Surveillance Department, Investment Management Department, Department of Economic & Policy Analysis, Office of Investor Assistance & Education, National Institute of Securities Markets and Information Technology Department.

Ms. Buch has also served as  a Consultant to the New Development Bank in Shanghai.  Ms. Buch also served as the Head of the Singapore office of the Private Equity Firm, Greater Pacific Capital. She also served as the Managing Director and Chief Executive Officer at ICICI Securities Limited and as Executive Director, on the Board of ICICI Bank.  Ms. Buch also served as a non-executive director on the Boards of various companies.