The main branch of the Lalwani Family are descendants of Rai Seth Poonamchand whose father Hiralal had migrated from Merta, Rajasthan, to Bhopal in the early 1800s.

In 1944, he also founded the Bhopal Construction Company Ltd, which was commissioned for numerous government and private works, including the laying of railway tracks.

He was also closely associated with Prakash Chandra Sethi, Virendra Kumar Saklecha, and Sunderlal Patwa, all of whom were Chief Ministers of Madhya Pradesh.

As Founder President of the Bal Niketan Orphanage, he established the roots of an organisation benefiting orphans and children of jail inmates.

Lalwani successfully fought a Public Interest Litigation on behalf of the farmers of the village of Jamonia Chhir against the Government of India.

Upon winning the case in the Supreme Court of India, the farmers were awarded fair compensation for land which was declared to be under submergence by the Government.