Mary BethDeemer

Of Counsel

Pittsburgh + 1.412.394.7920

Mary Beth Deemer has handled high-profile civil and criminal environmental matters for more than 30 years. She has defended clients in grand jury investigations into alleged environmental crimes and in Environmental Protection Agency (EPA) nationwide enforcement initiatives. Mary Beth also has handled matters involving all of the principal Pennsylvania and federal environmental statutes, including the Resource Conservation and Recovery Act (RCRA) and the Bevill Amendment. She has extensive Superfund experience including precedent-setting Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) litigation and appeals to the Fourth Circuit and U.S. Supreme Court. Mary Beth has represented clients at numerous sites in a variety of contexts, including unilateral administrative orders, government cost recovery actions, administrative settlements, and private cost recovery and contribution litigation. She heads the Environmental, Health & Safety Practice in the Pittsburgh Office.

For the last 20 years, Mary Beth has represented a large fertilizer manufacturer in a variety of environmental matters and has developed a deep understanding of the industry and its operations. Her recent representations include a federal grand jury investigation into alleged environmental wrongdoing at the client's Louisiana facility and a Superfund matter in which the government initially declined to pursue other liable parties. Mary Beth also represented a majority shareholder of a Florida company under civil and criminal investigation for alleged violations of the Clean Water Act (CWA) and RCRA. She currently is defending a fertilizer manufacturer in an EPA nationwide enforcement initiative alleging RCRA violations.

Mary Beth speaks and writes on environmental topics including the development of natural gas plays, sustainability, and corporate disclosure and shareholder activism related to climate change.


  • Alcoa sold Gum Springs, Arkansas, facility to Veolia for $250 millionJones Day advised Alcoa Corporation (NYSE: AA), a global leader in bauxite, alumina, and aluminum products, on the $250 million sale of its Gum Springs, Arkansas, waste treatment facility to Veolia ES Technical Solutions.
  • Alcoa transfers Afobaka Hydroelectric Works to Republic of SurinameJones Day advised Alcoa Corporation in the transfer of the Afobaka Hydroelectric Works to the Republic of Suriname.
  • Wabtec and GE Transportation merge in $11.1 billion transactionJones Day advised Wabtec Corporation in a Reverse Morris Trust merger with GE Transportation, valued at $11.1 billion.
  • Wabtec completes $2.5 billion public offering of Senior NotesJones Day represented Westinghouse Air Brake Technologies Corporation (“Wabtec”) in connection with its underwritten public offering of $2.5 billion aggregate principal of Senior Notes, consisting of (i) $500 million aggregate principal amount of Floating Rate Senior Notes due 2021, (ii) $750 million aggregate principal amount of 4.150% Senior Notes due 2024, and (iii) $1.250 billion aggregate principal amount of 4.700% Senior Notes due 2028.
  • Surface mining company defeats Notices of Violations and Cessation Order on appealJones Day appealed a federal Interior Board of Land Appeals' administrative decision fining Amerikohl Mining, Inc. for sedimentation runoff from timbering activity conducted by a third party on property in Western Pennsylvania.
  • PGT Innovations acquires Western Window Systems for $360 millionJones Day advised PGT Innovations in its acquisition of Western Window Systems from PWP Growth Equity, the middle market private equity group of Perella Weinberg Partners, for $360 million in cash.
  • Total sells Atotech to The Carlyle Group for $3.2 billionJones Day advised Total in the $3.2 billion sale of specialty chemical affiliate Atotech B.V., a global manufacturer of high technology plating solutions, to The Carlyle Group.
  • Atlas Holdings completes first phase of purchase of NCR Corporation's Interactive Printer Solutions DivisionJones Day represented affiliates of Atlas Holdings, LLC in its acquisition of the Interactive Printer Solutions ("IPS") division of NCR Corporation.
  • Potash Corporation defends against EPA enforcement initiativeJones Day defended Potash Corporation of Saskatchewan, Inc. against an EPA enforcement initiative directed at sulfuric acid manufacturing plants and nitric acid manufacturing plants.
  • One Equity Partners acquires All Metro Health CareJones Day represented One Equity Partners LLC in connection with its acquisition of All Metro Health Care, a provider of in home care services.
  • MPLX and Marathon Petroleum Corporation acquire MarkWest Energy for $20 billion, creating fourth-largest MLPJones Day advised MPLX LP and Marathon Petroleum in MPLX's acquisition of MarkWest Energy Partners, L.P.
  • Rosebud Mining purchases CONSOL Energy's 49 percent interest in Western Allegheny Energy (WAE) joint ventureJones Day advised Rosebud Mining Company in its purchase from CONSOL Energy Inc. (NYSE: CNX) of CONSOL's 49 percent interest in the Western Allegheny Energy (WAE) joint venture between the two companies.
  • Blue Point Capital exits Area Wide Protective to Riverside CompanyJones Day advised Blue Point Capital Partners in its sale of AWP Holding Company, a provider of outsourced traffic management solutions, to The Riverside Company.
  • Peaked Hill Partners completes equity injection with Arc InternationalJones Day represented Peaked Hill Partners LLC ("PHP") in connection with an equity injection from an investor group led by PHP in Arc International, a producer of glass tableware, completing the group's recapitalization, and providing funds for the modernization of their main production site in Arques, France, funding of a Social Plan linked to the restructuring plan, and various growth initiatives.
  • Macy's acquires Bluemercury for $210 millionJones Day advised Macy's, Inc. in its bid for and acquisition of Bluemercury, Inc., America's largest and fastest-growing luxury beauty products and spa services retailer, for $210 million in cash.
  • High Road Capital acquires York WallcoveringsJones Day advised High Road Capital Partners in connection with the acquisition and related financing of York Wallcoverings Inc., a manufacturer of wallpaper, borders, murals, and RoomMates peel-and-stick removable and reusable wall decals.
  • Total finalizes acquisition by Arkema of Total's Bostik Adhesives unit for €1.74 billion (US$2.2 billion)Jones Day represented Total SA in the €1.74 billion (US$2.2 billion) acquisition by the French group Arkema, one of the world’s major players in specialty chemicals, of its Bostik affiliate, a global adhesives company.
  • Atlas Holdings launches Aludium with acquisition of Alcoa's rolling assets in Spain and FranceJones Day advised Atlas Holdings in the acquisition of three aluminum rolling mill facilities in Europe from Alcoa Inc. and the launching of Aludium, Atlas's newest operating company, with the acquisition of the rolling mills in Spain and France.
  • Rosebud Mining acquires mining assets of AMFIREJones Day advised Rosebud Mining Company in the acquisition of substantially all of the mining assets of AMFIRE Mining Company, LLC, a subsidiary of Alpha Natural Resources, Inc.
  • BAE Systems acquires Perimeter Internetworking Corp., d/b/a SilverSky, for £144.4 million (US$232.5 million)Jones Day advised BAE Systems, a leading multinational defense, security, and aerospace company, on its acquisition of Perimeter Internetworking Corp., d/b/a SilverSky, a commercial cyber service provider, for £144.4 million (US$232.5 million).
  • Speaking Engagements

    • October 15, 2015
      2015 Regional Energy Conference: Navigating Turbulences in Global Oil & Gas Markets
    • July 25, 2014
      Jones Day Regional Energy Conference, International Implications of the Marcellus and Utica Shale
    • February 14, 2013
      Jones Day Regional Energy Conference, Harnessing Regional Opportunity in the new Energy Economy
    • July 21, 2011
      2011 Speaker Series
      Transactions in the Marcellus Shale: The Next Moves on the Game Board
    • May 19, 2011
      Jones Day MCLE University - Chicago
    • March 1, 2011
      Nanomaterials: Seizing Opportunities, Managing Risks
    • November 11, 2010
      2010 Speaker Series: Marcellus Shale
    • March 25, 2010
      2010 Speaker Series: Climate Change and Renewable Energy
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