The Thompson Foundry was established by David Thompson and James Thompson, who migrated from Northern Ireland in 1852-1853. They were engaged in the erection mining quartz-crushing batteries, engines, pumping and winding gear, around the Castlemaine area. They began their engineering business and within ten years, this business became focus of their work. They gained contract with the Victorian Railways, their pumping gear was highly regarded. During World War 11, they gained much defense work and was employing eight hundred tradesmen. 
In 2015 The Thompson Foundry was nominated for Engineering Heritage Australia Heritage Recognition Program. "Thompson's Engineering Works has historical significance for the important role it has played in the development of an engineering and manufacturing industry in Australia. It was one of the three main employers in Castlemaine during its heyday, employing up to 800 workers during World War II 1 and produced some of Australia’s greatest engineering accomplishments. The company became one of the major manufacturing industries in Victoria and throughout Australasia, designing and manufacturing machinery, sluicing and dredging equipment, pumping plants, railway points and crossings, steam locomotives, revolutionary stationary steam engines and various turbines among many other things". 
5 Parker Street, Castlemaine, Victoria 3450.
David Thompson Memorial Scholarship was established after the death of David Thompson Junior, the scholarship will be awarded every five years for an engineering course. 
Engineering works, repairing and manufacturing gold-mining machinery
Production of a wide range of steam-engines, boilers, mining machinery, railway equipment and centrifugal pumps
- ↑ Records of the Castlemaine Pioneers. Melbourne: Rigby, 1972.
- ↑ Nomination Engineering Heritage Australia Heritage Recognition Program for Thompsons of Castlemaine. File:///F:/Castlemaine/Castlemaine/Thompsons%20of%20Castlemaine.Nomination.V9.August%202015.pdf. accessed online 8 May 2018.
- ↑ Castlemaine Technical School. Castlemaine Mail, p4. 23/11/1918.
--Sue McPhan 12:06, 8 May 2018 (AEST)