He was born to Mata Mehtab Kaur and S. Lal Singh Safedposh at village Lopon in 1864 AD. He spent his childhood in his hometown. He learnt Gurumukhi script and lessons of pronunciation of Gurbani from Bhai ji of Gurudwara Sahib. He did household work with the family too.
As an adult, he served the army. He adopted a married life and was blessed with a son. Many Sikh soldiers of Sikh regiment No.36, in which he was posted used to go to Hoti Mardan on a holiday to pay homage to Sant Karam Singh ji.
He was fortunate enough to go with them and have a holy glimpse of (do darshan of) Sant Maharaj ji. As a result of this divine glance of Sant ji, his mind became detached from the world. He decided to quit his household and military job.
Sant Maharaj ji disallowed him to relinquish the job, and ordered that he should retire after getting pension of a Hawaldar. He accepted the directive but stopped going to his hometown Lopon during his annual leave. During the leave, he started doing service (sewa) at Hoti Mardan eagerly.
When Sant Karam Singh ji Maharaj psyched-up to renounce his mortal body, he asked, “Attar Singh! What shall I bless you with, from Guru Sahib’s treasury?” He asked for a boon of service.
Sant Maharaj ji pronounced, “The Tenth Guru’s place at Rampur village in your area is deserted. Sangat has requested to send a Sewadar there, many a times. You yourself have asked for the sewa. After getting pension, get ready to serve Guru ji’s place.”
After that, he started going to Rampur village and started having discussions with the residents of the area for sewa of the Guru ji’s place. After getting pension, he came to serve Guru Gobind Singh ji Maharaj’s place Gurudwara Reru Sahib at Rampur village permanently.
He started doing service with his job-earnings and pension. Following the footsteps of Guru Nanak Dev ji and presenting a model of service to the Sangat, he started ploughing himslef.
Neither did he appeal to anyone for money nor give a call for donation. Beautiful Gurudwara Sahib got ready in no time with the support of local Sangat.
Guru ka langar commenced. Routine flow of Katha-Kirtan (discussion and recital of Gurbani) got initiated. A centre of Gurmat preachings was established in that area at Gurudwara Reru Sahib.
Emulating his spiritual life, great saints like Bhagat Puran Singh ‘Pingalwara’ got dedicated to the service of humanity.
At last, he handed over the precious diamonds like Sant Isher Singh ji and Sant Kishan Singh ji (Rara Sahib), and Sant Bhagwan Singh ji (Reru Sahib) to the Sikh world and went to his heavenly abode on 22nd January, 1927 AD.