Sinh has held various ministerial portfolios and committee positions over the years, including as Union Minister for Communications in 1991.
Sanjay Sinh was born on 25 September 1951. His father was Raja Rananjay Sinh. He married to Garima Singh and had a son and two daughters.
A part of his education was at the city's Ranvir Rananjay Post-Graduate College and he gained an MA in Hindi and a PhD from Awadh University.
Aside from his involvement in politics, he has listed his professions as being an agriculturalist, pilot and a social worker. He holds the rank of Major (retired) in the Indian Territorial Army and also has a private pilot's license.
Singh had lent support to Sanjay Gandhi when that member of the Nehru-Gandhi family had chosen to contest the Amethi constituency in the elections of 1980. The Amethi area has strong links to the Nehru-Gandhi family and at that time the neighbouring constituency of Rae Bareli was held by Sanjay's mother, Indira Gandhi. He subsequently became a friend of Rajiv Gandhi, who succeeded Sanjay as the representative for Amethi.
His association with the Gandhi family "shot [him] into political limelight", according to The Times of India. However, Sinh left the Gandhi-led Indian National Congress (INC) party in 1988 and joined Janata Dal, which was led by a relative of his first wife. Despite a general mood favouring Janata Dal, Sinh's attempt to oust Rajiv Gandhi in the Indian general election, 1989 did not reflect it and he was heavily defeated by the incumbent. He later changed his allegiance to that of the Bharatiya Janata Party (BJP) and in the 1998 Lok Sabha elections he won the Amethi constituency seat. After the assassination of Rajiv Gandhi, a colleague of Gandhi in the INC, Satish Sharma, had become the Amethi representative but he neglected his constituents and caused them to flock to Sinh. Although Sinh stood again as the BJP candidate in the elections of 1999, on that occasion he was faced with a challenge from the widow of Rajiv Gandhi, Sonia, who played heavily on her family's contributions to the area. Sinh lost.
He rejoined the INC in 2003, choosing to announce his move on the birth anniversary of Rajiv Gandhi. He gained a second term as a member of the lower house of the Parliament of India in the elections of 2009. Since that time, he has represented the Sultanpur constituency as a member of the INC.
The Lok Sabha profile shows that he has held the following positions:Member, Uttar Pradesh Legislative Assembly(two terms) 1980–1989
Minister of State, Forests, Animal Husbandry and Dairy Development, Sports and Youth Welfare, Government of Uttar Pradesh 1982–1985
Minister of Transport, Uttar Pradesh 1985–1987
Member of the Rajya Sabha 1990
Union Minister, Communications, 1990–1991
Elected Member of the 12th Lok Sabha, 1998
Member of the Committee on Human Resource Development and its sub-committee on Value Based Education 1998–1999
Member of the Consultative Committee, Ministry of Defence 1998–1999.
Member, Joint Committee on Offices of Profit Member, 1998–1999
Elected to 15th Lok Sabha (second term) 2009
Member, Committee on Rural Development. 31 August 2009
Member, Committee on Petitions. 23 September 2009
Member, Consultative Committee, Ministry of Health & Family Welfare. 23 September 2009
Member, Consultative Committee, Ministry of Civil Aviation. 23 September 2009
He was elected to the Rajya Sabha on 10 April 2014 from the state of Assam. As of 1 September 2015 he serves as a member of the Parliamentary Standing Committee on Chemicals and Fertilizers.
He has noted "games and sports" as his "favourite pastime and recreation" and that his special interests are flying, riding, shooting and swimming. As of the 15th Lok Sabha, he was President of the Uttar Pradesh Hockey Association and of the Uttar Pradesh Football Sangh, as well as Vice-President of the All India Football Federation. At that time he was also a member of clubs in Lucknow and New Delhi and was serving on the governing body of the Sports Authority of India. Other involvements included the Delhi Development Authority and the Siri Fort Sports Complex in New Delhi.
Sinh has an interest in the upliftment of disadvantaged rural populations. and he founded the Rajarshi Rananjay Sinh Jan Kalyan Samiti, which operates primarily in the sphere of providing free healthcare. Since 1998, the organisation has also organised mass marriages on an annual basis, which has been described as "pioneering work ... arranging mass marriages of girls of poor people with no distinction based on caste, community, religion or class".
At various times, Sinh has served as an officer or president of numerous schools and colleges in Amethi. He has also been chairman of the Pradesik Co-operative Dairy Federation of Uttar Pradesh.
Syed Modi, a badminton player who had won numerous national and international titles, was shot dead on 28 July 1988 in Lucknow. The murder attracted worldwide attention. There were suggestions that Modi's wife, Ameeta, was involved in a relationship with Singh, who was a close friend of the couple and at whose house they had married. In late August, the Central Bureau of Investigation (CBI) launched a search of Singh's house. The investigation was urged upon the CBI by the government of Uttar Pradesh and in November 1988, Ameeta Modi, Singh and another politician, Akhilesh Singh, were charged with conspiracy to commit murder. Four others were charged with the murder itself. Subsequently, Modi, Sanjay Singh and Akilesh Singh successfully challenged the charges laid against them, resulting in the charges against Modi and Sanjay Singh being dropped in September 1990 and those against Akilesh Singh following the same course in 1996. The Supreme Court upheld the rulings of the lower courts.
Singh claims to be married to Modi's widow, Ameeta, but his first wife, Garima, has contested the legitimacy of the marriage. Garima claims that both the High Court and Supreme Court have declared the alleged mutual divorce between herself and Singh in 1995 to be null and void. Singh has accepted the court rulings but denies her claim that they were made because he arranged for an imposter to portray her in the divorce case. Despite the rulings, he maintains that Ameeta is his legally wedded wife.
In 2014, the marital arrangements resulted in a public dispute regarding property inheritance. Singh and Ameeta live at Bhupati Bhawan, a 450-year-old former royal palace in Amethi, Uttar Pradesh, that Garima had to leave around the time of the now-voided divorce. In July 2014, Garima returned to claim the right of inheritance for her son and grandson which she felt was endangered because, she claims, Ameeta had been selling the properties as well as transferring them into the charitable trust headed by her.
On 25 July 2014, Garima Singh reached the palace along with her children. A row developed between her party and people guarding the building, news of which soon spread to nearby villages and attracted people who supported her and her eldest son, Anant Vikram Singh. A fight ensued.
On 14 September 2014 Sanjay and Ameeta were about to enter the palace, where Garima and the children were now living, when clashes erupted between the opposing supporters. Police resorted to a baton charge to control the situation. Several people were severely injured, there were claims of police brutality and a policeman was killed.
During the inheritance dispute, Anant Vikram Singh has demanded a further CBI inquiry into the killing of Syed Modi. Garima Singh and her children claim that the local administration has been working in tandem with Singh and continuously posed obstacles in their way to obtain justice.