Efrin Ortiz-Quinonez

Efrain is one of Drill Tech’s Senior Tunnel Superintendents, providing on-site supervision to ensure the safety and quality of the project. He has over 30 years of tunneling expertise that ranges from major rapid transit projects to hand excavated tunnels and shafts. Mr. Quinonez’s experience includes sequential excavation and support methods (SEM/NATM) tunneling, hand mining, and TBM excavation tunnels. His specialization is in trenchless tunneling such as boring and jacking.