Leimgruber had many different jobs, among them journalist at La Liberté and at Freiburger Zeitung, adjunct director of the museum of arts and occupations, and cantonal secretary of arts and occupations, as well as lawyer.

Named Vice-Chancellor in 1925, he created the Federal printed matter and materials center.

He has written extensively on issues of the economy, administration, sociology and jurisprudence.

Leimgruber introduced simultaneous translation of speeches in the National Council.

For the centenary in 1948, he was the co-editor of the book Emblem, seals and constitutions of the Swiss Confederation and the cantons and Adjusted collection of federal laws and regulations from 1848 to 1947.