Rosin Group delivers Switzerland’s largest satellite cleanroom facility for SWISSto12

By Alexa Hornbeck | Published: 19-Mar-2026

The aerospace company has built a 1,000 sqm ISO Class 8 assembly site, establishing Switzerland’s first end-to-end domestic production hub for GEO-class satellites

SWISSto12 worked alongside a local Swiss family firm, Rosin Group, to open a 1,000 sqm ISO Class 8 cleanroom facility in Renens. 

The move marks a major expansion of its satellite manufacturing capabilities and establishing the country’s first domestic, end-to-end production site for geostationary satellites of this class.

The purpose-built cleanroom has been designed for the industrial-scale assembly of the company’s HummingSat platform, a compact geostationary satellite that uses proprietary 3D printing technology to reduce manufacturing time, cost and size. 

“For our cleanroom operations, SWISSto12 has several green measures in place, including washable overalls and recyclable consumables to reduce product and energy wastage,” a spokesperson from SWISSto12, told Cleanroom Technology

The facility complements SWISSto12’s existing 5,500 sqm development and production site in Renens.

Founded in 2011, SWISSto12 develops 3D-printed radio frequency payloads and satellite systems for a range of missions and orbits, working with global satellite operators and institutional partners.

According to the company, the expansion enables full in-house integration of advanced satellite payloads and spacecraft, supporting faster delivery cycles and increased production capacity.

The announcement follows a €73m ($84.8m) investment secured in January from the European Space Agency (ESA), underlining institutional backing for SWISSto12’s technology and commercial roadmap.

“Bringing this integration capability for our advanced satellite payloads and HummingSat in-house is central to our strategy to reduce the time and cost of building our products,” said Emile de Rijk, CEO of SWISSto12.

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