[3] He is a Bharatiya Janata Party (BJP) national executive member and was the chief spokesperson for the union territory of Jammu and Kashmir.

In 2008, Singh was appointed spokesperson of the Shri Amarnathji Sangharsh Samiti, an umbrella organisation of right wing parties during the Amarnath land transfer controversy.

[10] During his stint with the organisation, he took premature retirement as a professor of endocrinology in the Government Medical College, Jammu to join the Bharatiya Janata Party in 2012.

[19] In March 2014, the party announced that Singh would contest the upcoming general election from Udhampur constituency in his native Jammu.

[20] His primary competitor was Ghulam Nabi Azad of the Indian National Congress party who was a former chief minister of the state.

[26] As a minister of science and technology, Singh launched India's first indigenously made research vessel named "Sindhu Sadhana" on 14 July 2014 from Mormugao harbour in Goa.

[27] In a written response to the Lok Sabha on 31 July, he announced that India had signed cooperative arrangements with 33 countries for "peaceful use of outer space".

[33] On 29 April 2018, he along with ISRO chairman K. Sivan confirmed that India would send a crewed mission to the moon by 2022 as proposed by Prime Minister Modi.

[14][36] On 8 November 2014, in a cabinet reshuffle, Singh was appointed Minister of State (Independent charge) in the Ministry of Development of North Eastern Region and replaced V.K.

[37] In the ministry, he introduced the use of satellite imaging for surveying and building roads and for "preparation of utilisation certificates with fool-proof accuracy".

In the Startup India scheme launched by Modi, the ministry added an additional incentive, "venture" funds.

This fund would provide the aspiring entrepreneurs "relief from financial liabilities" and thus according to Singh, youth from other parts of India would "participate in the development of the North-Eastern States".

However, talks fell flat when the National Conference rejected the demand of a Hindu chief minister for which Singh was a front runner.