[1] Jackling worked at the Cripple Creek & Victor Gold Mine from 1893 until 1895, first as a miner, then as a millman and metallurgist.

Starting in 1896, Jackling worked for Joseph Raphael De Lamar in Mercur, Utah where he developed a cyanide process for extracting gold ore.[1] Jackling followed up at the Missouri School of Mines with a degree in metallurgical engineering in 1900, then worked a gold mine in Republic, Washington.

[1] In the mid-1890s, Jackling, Hartwig Cohen and mining engineer Robert C. Gemmell made a detailed examination of the Bingham Canyon, Utah, copper property, most of which was owned by Enos Andrew Wall.

[1] In 1904, Jackling recommended open pit mining, using steam shovels to load railroad cars.

"[2] Jackling received the Distinguished Service Medal from President Woodrow Wilson in 1919 for directing the U.S. government explosives plants, like the one at Nitro, West Virginia, during World War I.

[8] The Jackling House, the historic Spanish Colonial Revival Style mansion and estate, was located in Woodside, California.

In 2004, Jobs stirred Woodside preservationist controversy by applying for a permit to tear the historic landmark down to build a smaller house.

In April 2007, the California State Supreme Court refused to hear the Jobs appeal, which meant he could not raze the house.

Nonetheless, Jobs won approval to demolish the Jackling House from the Woodside Town Council on May 13, 2009.