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Tunnels &


About Us

Bessac is a company specialized in the construction of tunnels and microtunnels, and has carried out more than 40 years of underground works, in various applications.

Bessac offers:


equipes reactives
A group of highly mobile and reactive teams that are uniquely specialized
plus 40 tunneliers
A fleet of more than 40 TBMs and MicroTBMs
A high capacity for innovation


Tunnel contracting

BESSAC has been building tunnels and microtunnels for more than 40 years. With a wealth of experience, we have realized projects on every continent. Our international activity represents a majority of our business.


Industrial division

  • Strengthened by more than 40 years of experience, the Industrial Division of Bessac has fully mastered the entire production chain, as well as usage of TBMs and their associated equipment.
  • With a full design team, the Industry Division of Bessac boasts highly qualified teams, internationally recognized in the field of underground works.