he was the general secretary, youth congress karnataka from 1999 to 2009. he became kpcc member in the year 2005. in 2010, gulbarga south by-election was held due to sudden demise of the sitting bjp mla chandrasekhar patil revnoor. dr. ajay singh took the challenge to fight the election from congress in this unknown turf. he was defeated by the widow of the late mla by a narrow margin. he took the charge of election campaigning and management for his father, mr. dharam singh, in the 2009 parliament election from bidar. mr. dharam singh won the election by 39619 votes. he led the congress team in jewargi taluk in 2010 local body election. in the election, congress won 4 zila panchayat seats out of 6 available seats and 14 taluk panchayat seats out of 22 available seats. he became a unanimous choice of the mla candidate in the 2013 assembly election. in 2013 assembly election of karnataka, he defeated the sitting bjp mla, dodapagouda by 36700 votes from jewargi. this is the highest margin in the gulbarga district and 3rd best margin in the overall hyderabad-karnataka region.