[2] Born in Manipur, Dheeraj was part of the AIFF Elite Academy batch that was preparing for the 2017 FIFA U-17 World Cup to be hosted in India.

Dheeraj played his first match for the club on 29 September 2018 in the opening fixture of the 2018-19 Indian Super League season against ATK which ended 0-2 to the Blasters.

He was named in AFC Champions League team of matchday for his good performances, against Al-Rayyan on 14 April 2021, where he kept a cleansheet in a 0-0 draw.

He made a whopping 26 saves in five matches to top the goalkeeping chart of the West Zone group league stage.

"Dheeraj Singh certainly made a name for himself on his continental debut, pulling off a tournament-leading 26 saves in just five games, among them a number of memorable efforts that earned high praise from impressed observers," the AFC said on its website.

[23] In 2021-22 ISL season, he made fifteen appearances but his sole clean sheet came in a 5-0 victory over Chennaiyin FC with Goa finishing ninth in the league.

[24] After not playing a single game at 2022 Durand Cup, he started the season in the first match of 2022-23 ISL in a 2-1 win over East Bengal.

[25] He made nineteen appearances and kept four cleansheets as Goa finished seventh in the league failing to qualify for playoffs.

Even though he couldn't keep a clean sheet in any of the World Cup games, he was highly praised by fans and various managers for his technique and skills.