Robert A. Woellner, M.S., is the President of QUEST Environmental and QUEST Management International. Bob has more than 25 years of environmental risk assessment, industrial hygiene, indoor air quality, scientific investigative, and environmental management systems consulting experience. He serves on several boards, teaches college classes, and has published many articles and contributed to several books regarding environmental risk management. He has qualified and served in numerous jurisdictions as an expert in industrial hygiene, environmental monitoring, microflora/mold, meth, indoor air quality, environmental sampling, and risk management, for dozens of environmental contamination cases. He holds a Bachelor's degree in Geology from Middlebury College and a Master of Science degree in Marine Geology and Geophysics from the Rosenstiel School of Marine & Atmospheric Science.

John Voorhees, J.D., a Shareholder at Greenberg Traurig, LLC, has practiced law for over 40 years and is a member of the American, Colorado, and Denver Bar Associations. He focuses his practice on compliance counseling, particularly on environmental, health care, fraud, and white collar matters. He has defended Superfund and Clean Water Act cases and a wide variety of other civil and criminal cases. He has represented hospitals and a disease management company in disputes with the Centers for Medicare and Medicaid Services (CMS) and is experienced at litigating hospitals' Medicare reimbursement claims against CMS, as well as fraud, waste, and abuse claims. He spent 11 years as a federal prosecutor in the Organized Crime & Racketeering Section of the U.S. Department of Justice before entering private practice in 1988. John received his law degree from the Columbus School of Law, Catholic University of America. He has represented QUEST since 1995.

Christopher L. Bell, J.D., is a partner in the international law firm of Greenberg Traurig LLP. He counsels clients and defends in civil and criminal enforcement cases on a wide range of issues, including compliance with water, waste, air, chemical, transportation, pollution prevention, cleanup, product stewardship, and safety requirements as well as international issues such as the EU's ROHS Directive and REACH Regulation, and issues such as climate change, sustainable development, nanotechnology, and social responsibility. He participates in legislative and regulatory advocacy involving most of the major environmental laws. He has extensive experience designing, implementing, and auditing environmental management and compliance assurance systems, including systems based on ISO 14001, RC 14001, and the Sentencing Guidelines. He was a lead U.S. international negotiator on ISO 14001 for a decade and also served as a negotiator in the development of the ISO 37001:2016 standard on antibribery management systems. He is currently serving as an independent monitor overseeing compliance with complex federal debarment and probation agreements arising from the resolution of a major criminal environmental case.