Regulatory & Legislative Support Group


Justin H. Oberst

Justin Oberst

Managing Partner, The Horinko Group
Director, Regulatory & Legislative Support Group

202.955.6203

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Justin H. Oberst is a Managing Partner of The Horinko Group. Previously, Mr. Oberst served as a Project Manager for the Global Environment & Technology Foundation, focusing primarily on research and analysis in support of a wide range of environmental projects. He supported a variety of programs, including the Mid-Michigan Regional Management System, Green Highways Partnership, and the Water and Development Alliance (a $10 million partnership between Coca-Cola and the U.S. Agency for International Development). He has substantial experience working with the highest levels of government and corporate America. In this role, Mr. Oberst has utilized his law degree and legal experience to provide an analytical approach to support a wide range of projects across environmental media. He excelled during his time at University of Nebraska College of Law, receiving multiple awards and graduating with distinction in 2005.

Mr. Oberst’s legal and environmental careers began after he had achieved tremendous success in the entertainment field. He founded Saddle Creek Records in the mid-1990’s, a company that grew under his watch into a multi-million dollar international success story. Mr. Oberst continues in his capacity as strategic advisor to current label executives, including traveling internationally to take part in negotiations. Mr. Oberst’s diverse career path informs every aspect of his strategic vision and work ethic. He continues to draw upon those myriad experiences to advise clients and create solutions to the most difficult challenges facing them.

G. Tracy Mehan

G. Tracy Mehan, III

Senior Advisor, Water Resources Regulation & Policy

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G. Tracy Mehan, III, an environmental consultant, was Assistant Administrator for Water, U.S. Environmental Protection Agency, 2001-2003. He has been a Senior Advisor for The Horinko Group since 2008. Mr. Mehan was a Principal with The Cadmus Group, Inc., from 2004 to 2014.

He is an Adjunct Professor of Environmental Law at George Mason University School of Law since 2006.

Mr. Mehan served as Environmental Stewardship Counselor to the 2004 G-8 Summit Planning Organization. He was Director of the Michigan Office of the Great Lakes (1993-2001), Associate Deputy Administrator at EPA (1992) and Director of the Missouri Department of Natural Resources (1989-1992).

He has served on the Water Science and Technology Board and the Committee on the Mississippi River and the Clean Water Act for the National Research Council of the National Academies. He also served as an expert judge for the Municipal Water Conservation Achievement Award Program (2006) sponsored by the U.S. Conference of Mayors and its Urban Water Council. He is a former member of the Board of the Great Lakes Protection Fund.

Mr. Mehan currently serves on EPA’s Environmental Financial Advisory Board as well as the Boards of the U.S. Water Alliance, the Great Lakes Observing System (GLOS), and the Potomac Conservancy.

He is a graduate of Saint Louis University and its School of Law.

Emily Hammond

Emily Hammond

Professor of Law, The George Washington University Law School
Senior Advisor, Energy/Electricity, Water Quality/Use, & Regulatory Decisionmaking

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Emily Hammond is Professor of Law at the George Washington University Law School. She is a nationally recognized expert in energy law, environmental law, and administrative law. A former environmental engineer, Professor Hammond brings technical fluency to cutting-edge issues at the intersection of law, science, and policy. Her articles have appeared in numerous top-ranked journals, including the Columbia Law Review, the Duke Law Journal, the Michigan Law Review, and the Vanderbilt Law Review. She is a co-author of one of the nation’s leading energy law texts, Energy, Economics and the Environment, and the environmental law text Environmental Protection: Law and Policy, in addition to numerous book chapters and shorter works.

Professor Hammond’s consulting expertise concerns the energy sector and electricity markets; water quality and use; and regulatory decisionmaking and procedural processes. She earned her J.D. summa cum laude from the University of Georgia and her B.S. cum laude from Virginia Polytechnic Institute and State University.

Paul Yaroschak

Paul Yaroschak, P.E.

President of Sustainable Methods, LLC
Senior Advisor, Sustainability, Contaminated Site Cleanup, & Chemical Risk Management

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Paul Yaroschak has over 35 years of experience managing Department of Defense environmental programs. From 1991 to 2006, Mr. Yaroschak served as the Director of Environmental Compliance and Restoration Policy in the Office of the Assistant Secretary of the Navy (Installations and Environment). He also acted as Deputy Assistant Secretary of the Navy (Environment) between political administrations. His responsibilities included policy formulation, oversight of a $1 billion annual environmental program, and negotiations on issues related to environmental compliance, restoration and pollution prevention. He has a wide variety of experience at both field and headquarters levels in environmental engineering and environmental policy. From 2006 to 2016, Mr. Yaroschak served as the Deputy for Chemical & Material Risk Management in the Office of the Secretary of Defense. In this position, he was instrumental in developing a program to identify, assess, and develop risk management actions for emerging contaminants. This program won an award in Harvard University’s “Innovations in American Government” program. Mr. Yaroschak is currently the President of Sustainable Methods, LLC, which provides consulting services for environmental and sustainability matters.

Mr. Yaroschak graduated from Villanova University with a B.S. in Civil Engineering and was commissioned as an Ensign in the Civil Engineer Corps of the U.S. Navy. While on active duty, he developed an environmental program for a Naval Air Station and obtained a M.S. in Environmental Engineering from Northeastern University. He then began a civilian career with the Naval Facilities Engineering Command in Alexandria, Virginia. After completing the Navy’s 36-month Executive Management Development Program, Mr. Yaroschak became the first Deputy Assistant Commander for Environment, Safety, and Health at the Naval Facilities Engineering Command. During the 1980s, Mr. Yaroschak was instrumental in developing the Navy’s environmental program structure and managed a $300 million per year budget for pollution abatement projects.

In 1989, Mr. Yaroschak became Head of Shore Facilities Environmental Protection in the Office of the Chief of Naval Operations where he led an effort that resulted in a doubling of the Navy’s environmental budget. In 1992, he accepted a position with the newly formed Office of the Assistant Secretary of the Navy (Installations and Environment). In this position he developed the Department of the Navy’s first environmental program strategic plan and had extensive interactions with the regulator community.

In 1995, Mr. Yaroschak received the Secretary of the Navy Special Act/Service Award for his accomplishments in forging consensus with stakeholders on national environmental issues. In February 1997, Mr. Yaroschak was awarded the Department of the Navy Superior Civilian Service Medal for his leadership in the Department’s Environmental Restoration Program. In April of 2000, Mr. Yaroschak completed the Senior Executive Fellows program at the John F. Kennedy School of Government, Harvard University. In 2003 and 2004, he received achievement medals from the Environmental Protection Agency for his leadership in developing innovative solutions to national issues related to the cleanup process and land use controls.

Beth Pitrolo

Beth Pitrolo

Senior Advisor, Permitting & Compliance

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Beth Pitrolo served nearly two decades as Assistant District Counsel for the U.S. Army Corps of Engineers. With a focus on attaining results while navigating a complex environmental regulatory landscape, she has been involved in a variety of environmental programs, including Hurricane Katrina remedial response at the Louisiana Recovery Field Office, defense of Clean Water Act permits, ensuring NEPA compliance for multi-million dollar civil works construction projects and development and implementation of CERCLA cleanup activities associated with radioactive waste from the Manhattan Project.

Ms. Pitrolo’s experience is also multi-national, providing support to interests abroad while advising on billions of dollars of projects managed through the Corps’ Europe District office. She served many years on the faculty of the Corps’ national training center in Huntsville, Alabama where she has been recognized for her ability to convey complicated legal concepts to diverse audiences.

Ms. Pitrolo served as an Assistant Attorney General in the Environmental Bureau of the Illinois Attorney General’s Office, where she litigated environmental enforcement and compliance actions brought at the request of various state agencies, including the Illinois Environmental Protection Agency, Department of Natural Resources, Department of Public Health and the Emergency Management Agency. She managed her own environmental consulting firm in Australia, working primarily for large mineral extraction companies including Exxon Coal and Minerals and BHP Billiton. She received her B.S. in forestry and wildlife management from West Virginia University, her M.S. in biological sciences from Marshall University, and her J.D. from the University of Houston.

Amy Schaffer

Amy Schaffer

Senior Advisor, Hazardous and Industrial Waste Risk Management

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Amy Schaffer is a consultant with in-depth experience developing and implementing federal environmental laws and regulations. She is a recognized leader in hazardous and industrial waste issues in the paper sector. She also has experience in addressing food-contact packaging issues, climate change, sustainability and “green” programs, and innovative approaches to resolving environmental concerns.

Ms. Schaffer was most recently Executive Director of the Recycled Paperboard Technical Association and has an on-going relationship, since 1991, with the American Forest & Paper Association supporting them on their waste program issues as well as product stewardship efforts. She worked with Weyerhaeuser Company on regulatory and legislative issues in their Washington, DC office. Ms. Schaffer also has management consulting experience with A.T. Kearney and began her career at EPA in the then nascent RCRA program.

Ms. Schaffer has a Bachelors Degree from Towson University and a Masters in Public Administration from the American University.

Geoff Grubbs

Geoff Grubbs

Senior Advisor, Water Quality, Risk Assessment, & Regulation

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Geoffrey Grubbs is a Senior Consultant for The Horinko Group. He directed the Office of Science and Technology at the U.S. Environmental Protection Agency from 1999 until 2005. He and his staff were responsible for risk assessments involving water quality, including the production of Clean Water Act water quality criteria and Safe Drinking Water Act maximum contaminant level goals. He was also responsible for water quality standards, analytical methods for measuring water pollution, and national regulations setting best available technology requirements for numerous industrial categories such as power plants, coal mining, and offshore oil and gas platforms. He also managed EPA’s national programs for fish consumption advisories and water quality at recreational beaches. Geoff served from 2000 to 2005 on EPA’s Science Policy Council, a senior-level group that coordinates difficult matters of science for EPA’s Deputy Administrator.

Prior to the Office of Science and Technology, Geoff directed EPA’s Assessment and Watershed Protection Division for 12 years, which is responsible for EPA’s national water quality monitoring programs and the Total Maximum Daily Loads program. He has also managed EPA’s national programs for watershed protection, nonpoint sources, water discharge permitting, and enforcement policy. Geoff worked for several years in the mid-1980’s for the United Nations Environment Programme in Nairobi, Kenya, and for USAID in Jakarta, Indonesia.

Geoff received his Bachelor of Science in Engineering Degree from Princeton University in 1972. He has received numerous awards, including the National Environment Award presented by the National Association of Clean Water Agencies. In 2005, President Bush conferred upon Geoff the rank of Distinguished Executive, the highest possible honor for a career federal executive.

Jeff Denit

Jeff Denit

Senior Advisor, RCRA & Remediation

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Jeffery Denit is a Senior Consultant for The Horinko Group. From 2001 to 2005, he served as the Superfund Special Assistant to the Assistant Administrator of the Office of Solid Waste and Emergency Response (OSWER) at the U.S. Environmental Protection Agency in Washington. From 1993 to 2001, he was the Vice President and Technical Director of Don Clay Associates, a consulting company that provided expert services to a diverse industrial clientele regarding hazardous waste regulatory, remediation, and policy issues.

Mr. Denit served at EPA as a Deputy Director of the Office of Solid Waste from 1985 to 1993 and as the Director of the Effluent Guidelines Division at the Office of Water from 1980 to 1985. Mr. Denit served as a U.S. Army CPT in the Medical Service Corps at Ft. Ord, California from 1968 to 1970.

Mr. Denit earned a Bachelors degree in 1964 and a Masters degree in 1966, both from Clemson University. In 1967, he earned a Master of Science degree from the University of North Carolina, Chapel Hill.