Created in 1986, SIEPEL is a French private company located in La Trinité-Sur-Mer in Britanny.

Specialised in designing, manufacturing and implementing electromagnetic absorbers and shielded rooms for the domains of Electromagnetic Compatibility (EMC), Microwave / antenna measurement but also cyber security, our field of applications has been extended to the realization of accredited measurements since the ISO / IEC 17025: 2005 accreditation in 2017 (scope n°1-6220 available on

SIEPEL benefits from a unique site which gathers all its departments: R&D, design, purchasing, marketing, workshops, quality, measurements, etc.

This centralization of skills allows SIEPEL to be reactive in answering requests of the most demanding customers. We offer a strong support to our customers and guide them thanks to our recognized know-how and expertise to answer as much as possible to their needs and to customize each project.

Throughout the years, SIEPEL has confirmed its leadership in France and became one of the best experts in these fields at the global scale (50% of the activity). In this way, SIEPEL relies on a distributors / representatives network in more than 30 countries and on a sales office in Taiwan.

SIEPEL and its collaborators share strong values which lead to the confidence of its customers: support and satisfaction of customers, confidentiality and ethical business conduct.

Our offer concerns various fields including automotive, space, aeronautic, industry, telecom and defense.