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Mark Nielsen is Ramboll’s Site Solutions Practice Leader. He has more than 25 years of environmental engineering experience, including the management of site assessment/remediation projects, with particular emphasis on the application of risk assessment and risk management strategies to site remediation and landfill closure projects under RCRA, Superfund and state cleanup programs in the US, as well as projects in Argentina, Brazil, China and Guam. Mark served as the program manager for the US Navy Environmental Engineering Services and Optimization Contract; this program focused on conducting remedy optimization studies for domestic US Navy facilities. He is a contributing author to technical guidance published by the Interstate Technical and Regulatory Council (ITRC), including Project Risk Management for Site Remediation and Contaminated Sediments Remediation guidance documents.