Nigg was born on 31 October 1893 in Vaduz as the son of a baker by the same name and his mother Baltissernée Celina as one of six children.

[1] Nigg was involved in establishing an independent stamp policy in Liechtenstein, starting in 1919.

As chairman of the livestock processing commission, he made a contribution to the eradication of bovine tuberculosis.

[1] After the resignation of Josef Hoop in 1945, Nigg was appointed by Alexander Frick as the Deputy Prime Minister of Liechtenstein.

[6][7][8] Nigg married Rosa Burtscher (5 May 1893 – 18 July 1987) on 9 September 1918 and they had four children together: Ernst, who became a priest,[1] his twin sister Hedwig (1920-2002), Berno (1925-2000) and Mathilde (1926-2005).