Tandon is the founder director of the Hriday Narain Dhawan Charitable Trust, which has been active in philanthropy in the district since before 2000.
[5] As an officer of the Enforcement Directorate, S. Tandon had investigated foreign front companies floated by Reliance, and also conducted a raid on the house of Tina Ambani.
Unnao is India's largest electoral constituency, and in the previous general elections in 2009, Annu Tandon had won the seat for Congress.
[10] In the Indian general election in Uttar Pradesh, 2009, Annu Tandon was fielded as a novice political candidate by the Congress.
Unnao is India's largest electoral constituency, and in the previous general elections in 2004, Congress had come up fourth here, and the seat had been won by the Bahujan Samaj Party (BSP).