Mr. Martin has over 26 years of comprehensive underground engineering experience on projects including those for the rail transit, water supply, wastewater, and mining. His experience includes construction feasibility assessments, design of soft ground and rock tunneling using various methods including; drill-and-blast, road header excavations, full-face tunnel boring machines in rock and soil, microtunneling, horizontal auger boring (HAB), pilot tube method (PTM), pipe ramming, horizontal directional drilling (HDD) and other trenchless methods. His experience also includes tunnel condition assessment, design of tunnel repairs, rock fall analysis, design of rockfall protection systems, design support and evaluation during construction, contract documents development, geotechnical data reports and geotechnical baseline reporting.