Samuel Rivera has 16 years of experience working in the environmental drilling industry, and previously spent 10 years in the oil industry. He has received his Class-A commercial driver's license, as well as certifications in emergency response and hazardous waste. Samuel completed the OSHA 40-hour HAZWOPER (29 CFR 1910.120) and 10-hour Construction courses and LPS training. Although he has used hollow stem and air rotary rigs, his expertise is in sonic drilling.