1966


1989

Creation of ATEM specialised in the organisation of the roll-out industrial plants (Nuclear, Steel industry,...)

Creation of Alphatem, a joint subsidiary with Cogema dedicated to the nuclear sector

1995

Merger of Atem and Alphatem to create Assystem and entry into the Paris stock exchange

1996



2003

Diversification of our competences to product design for Aerospace and Automotive sectors (Acquisition of Studia)


Penetration of the high tech sector

Merger with Brime Technologies

2005





2008

UK and India : Acquisition of Inbis, a British engineering Group

Germany : Acquisition of Atena, subsidiary of MTU Aero Engines


Creation of Silver Atena, a Euro-India joint venture in the field of Safety Critical Systems