Singhal is considered close to state Samajwadi Party chief Shivpal Yadav and his removal had fuelled the ongoing turf war in the Uttar Pradesh's ruling family.
He was till now posted as chairman State Vigilance Commission and Administrative Tribunal.
Deepak Singhal has been appointed Commissioner NCR, Ghaziabad, an official spokesman said.
Besides, Special Secretary, medical health and family welfare, Brijesh Narain Singh has been made Additional Resident Commissioner of UP in New Delhi in place of Ashok Kumar Srivastava, who has been appointed additional CEO NOIDA, the spokesman said.