General contracting company specialising in the construction of tunnels and microtunnels, BESSAC has been building underground structures for 40 years to serve a variety of applications including metro, water distribution, sewer, energy, mining, oil & gas, nuclear site, utility tunnel, sea intake and outfall. BESSAC masters all mechanized excavation techniques (microtunneling, EPB TBM, Slurry TBM, air pressurized TBM) and has over 120 km of microtunneling and tunnelling experience in about 100 projects in last 5 years. BESSAC also has an integrated industrial department specialising in the manufacturing of tunnel boring machines and related underground equipment. BESSAC acts in more than 20 countries and 60% of company sales are international.