Ernst Hubert Seifert (born May 9, 1855, in Sülzdorf; died April 27, 1928, in Cologne) was a German organ builder and the founder of three organ building companies, including the notable Romanus Seifert & Sohn. Seifert, the son of a Thuringian forester, trained as an organ builder under Jahn in Dresden. He made significant contributions to 19th-century organ building, notably through his invention of a unique membrane chest that operated precisely without requiring special wind or spring pressure. He patented this construction and sold it to the organ builder Schneider in Mudersbach.

In 1885, Seifert established his own organ building workshop in the Cologne district of Mannsfeld (today's Raderberg) and in 1906, he founded a branch in Kevelaer to manage the new organ construction at the local Marienbasilika. His brothers Gotthard and Eberhard, as well as his sons Ernst Jr., Walter, and Romanus, also worked in his workshop. Romanus took over the Kevelaer branch in 1914 and eventually ran it independently. Ernst Jr. later started his own business in Bergisch Gladbach. Walter continued to operate the original Cologne workshop under his father's name, resulting in two separate companies named Ernst Seifert. The Cologne branch ceased operations at the end of 1981/82, leaving the Kevelaer location as the primary seat of the business, now known as Orgelbau Romanus Seifert & Sohn GmbH & Co.

https://de.wikipedia.org/wiki/Ernst_Seifert_(Orgelbauer)