Ranjit Singh had seen him in action at Akalgarh three years earlier and again in the fight against the Bhangi Sardar of Gujarat. Mokham Chand had fallen out with his Bhangi master and had come to Ranjit for employment. Ranjit welcomed him with handsome gifts of an elephant and horses and granted him the Dallewalia possessions as a Jagir. He was made commander of a cavalry unit with power to recruit 1500 foot soldiers as well .
In the beginning of 1808 various places in the Upper Punjab were taken from their independent Sikh proprietors, and brought under the direct management of the new kingdom of Lahore, and Mokham Chand was at the same time employed in effecting a settlement of the territories which had been seized on the left bank of the Sutlej. But Ranjit Singh’s systematic aggression had begun to excite fear in the minds of the Sikhs of Sirhind
He was the commander in chief of armies in Battle of Attock which defeated Durrani Empire Wazir Fateh Khan and Dost Mohammad Khan.
Diwan Mohkam Chand was the Commander-in-Chief of the Sikh Forces from 1806 to 1814.
He died at Phillaur on October 16, 1814. His son Diwan Moti Ram and grandsons Diwan Kirpa Ram and Diwan Ram Dayal also served the state with distinction.