August Brotje founded his mechanical engineering and heating technology firm in 1919, in the lean years after the German collapse. For half a century the company name in Rastede meant heating systems. Then in the 1970s a subsidiary called Brotje-Sumak-Automation began building machine tools, and in 1979 it was renamed Brotje-Automation GmbH. The pivot was decisive. Through the 1980s and 1990s the new company delivered the first automated riveting machines that would attach to a fuselage skin and stitch it together at industrial speed, expanding from German aerospace into the United States, the rest of Europe, and eventually Asia.

Most travelers have never heard of Broetje, but most of them have flown on an aircraft built with its equipment. The customer list reads as a near-complete directory of commercial aviation: Airbus, Boeing, Bombardier, Embraer, Premium AEROTEC, Mitsubishi. The machines are turnkey: an aircraft manufacturer can order a full assembly line, with planning, design and integration all handled in Rastede. The work covers riveting and joining stations, full final assembly lines, and the newer composite production techniques the industry now depends on, including automated fiber placement and preforming for carbon-fiber and glass-fiber reinforced plastics. Around 700 employees make it work.

In 2003 the company was acquired by the Claas Group, the German agricultural machinery giant best known for combine harvesters. The Claas years brought capital and expansion. In 2012, Broetje and the investment company Deutsche Beteiligung AG bought the shares back, and the company quietly anglicized its spelling from Brotje to Broetje for international markets. In 2015 the Wiefelstede and Jaderberg sites consolidated into the new Rastede headquarters and a Japanese subsidiary opened in Tokyo. Then in 2016 the Chinese Shanghai Electric Group took over the entire firm. A heating-boiler maker from interwar Lower Saxony had become a strategic asset in the global aerospace supply chain.

Broetje today runs twenty-three locations across the major aerospace-producing nations: Germany, the United States, France, the United Kingdom, China, Russia and Japan, among others. Production sites sit in Chicago, Shanghai, Toulouse and Rastede itself. The Toulouse site puts the company physically next door to Airbus final assembly. The Chicago site does the same for the North American market. But the lights stay on in Rastede, and the strategic decisions still get made there. Walk into the headquarters complex on a weekday and you find engineers tuning the next generation of fastening robots for a wing that will eventually carry passengers from Munich to Mumbai.

From above, Rastede is the kind of place pilots ignore. Flat fields, a few church spires, a long straight road running north into the Ammerland marshes. The town's small castle, once a Romanov hunting lodge tied to the Oldenburg grand-ducal court, sits among quiet trees. There is nothing visible from cruise altitude to suggest that an industry critical to the aircraft you happen to be flying in is anchored beneath your seat. That is the point. The companies that supply the suppliers tend to live in towns like this, beneath the route maps rather than on them. Broetje built its global footprint without ever leaving home.