Kapur has been appointed to the post till she attains the age of 65 years, an order issued by Department of Personnel and Training said.
COMPAT is a statutory organisation to hear and dispose of appeals against any order passed by fair-trade regulator Competition Commission of India.
Kapur, a retired officer of Indian Revenue Service (Income Tax cadre), is a former chief of Central Board of Direct Taxes, the top policy making body on Direct Taxes.