Went to U.S. in 1869 and to New Mexico in 1872. Opened a store in Georgetown, NM in 1875. In 1880 Census taken at Georgetown, Grant, New Mexico it lists a 28 year old unmarried Sigmund Lindauer and gives as occupation General Merchandise. Relocated to Deming, New Mexico in 1880's. He was followed to America by two brothers, Samson and Albert.
In 1922 lived at 108 East Pine, Deming NM, USA. 1920 Census for village of Deming, NM lists no occupation.
Mentioned on his 1922 passport application: going to Germany-Switzerland-France-England-Austria-Belgium. He arrived in the United States on board the Main from Bremen about the last day of June 1869 and he at the time had resided in the United States for 53 years. He resided at Deming, New Mexico for fifty years. He was naturalized at the U.S. Dist. Court, 3rd Jud. District of New Mexico at Silver City, New Mexico on 26 July 1875. He gives his occupation as a merchant. The purpose of his trip is to go to France and Belgium to "visit battlefields where my son fought in U.S. Army" and Germany to "visit brothers and sisters". Returned to the United States on the Homeric on 30 August 1922. In 1883 Sigmund Lindauer helped charter an organization in St. Louis, Missouri which later became the American National Livestock Association.
On the 11th November 1878 he became postmaster, operating the post office out of his store. As with most of the stores at the time, he extended credit to his customers to keep their business. He was postmaster of Georgetown from 11th November 1878 to 28th May 1879 and of Santa Rita from 20th March 1883 until 2nd October 1883.