mumbai mar 1 senior ias officer ajay tyagi today took charge as the chairman of markets regulator sebi he is the ninth chairman of the securities and exchange board of india sebi and has taken over from u k sinha who completed his sixyear tenure the appointment of 58yearold tyagi who is known to keep a low profile is for a period of three years a 1984 batch ias officer of himachal pradesh cadre he has handled capital markets division in the finance ministry he visited the famous shree siddhivinayak ganapati temple here before taking charge tyagi has diverse experience at the centre he was joint secretary in ministry of environment forest and climate change before joining finance ministry in november 2014 as additional secretary he has also worked in ministries of petroleum and natural gas steel and rural development a native of uttar pradesh he had done post graduation in economics he did masters in public administration from harvard and holds masters degree in technology computer science as per his official resume with a tenure spanning six years sinha was the second longest serving sebi chief after d r mehtas sevenyear term from 1995 to 2002 sinhas three predecessors c b bhave m damodaran and g n bajpai had tenures of three years each sebi besides regulating stock exchanges also supervises various kinds of market entities including brokers mutual funds fiis rating agencies and investment bankers as also thousands of listed companies ssm ram mr