Person Photo
Person Photo

Susan Mathiascheck

Of Counsel

505 9th St. NW, Suite 700, Washington, DC 20004

Susan helps clients navigate environmental requirements to obtain and defend project approvals, litigate challenges to regulatory action, and address enforcement and citizen suits.

Susan works extensively with energy and natural resource companies as well as trade associations and governmental entities. Susan has particular expertise handling complex regulatory challenges, collaborating with clients to develop strategy and representing clients in rulemaking proceedings. Her extensive environmental litigation experience includes defending clients in compliance and enforcement actions under the National Environmental Policy Act (NEPA), the Clean Water Act, the Clean Air Act, the Endangered Species Act, Superfund, and the Resource Conservation and Recovery Act (RCRA), as well as other federal environmental statutes.

Susan also draws on her experience as Associate General Counsel for the Nuclear Energy Institute where she developed policy strategies on NEPA, Clean Air, Clean Water, radiation protection, and other environmental and nuclear regulatory issues.


Bar Admissions

Court Admissions


Unless you are a current client of Holland & Hart LLP, please do not send any confidential information by email. If you are not a current client and send an email to an individual at Holland & Hart LLP, you acknowledge that we have no obligation to maintain the confidentiality of any information you submit to us, unless we have already agreed to represent you or we later agree to do so. Thus, we may represent a party adverse to you, even if the information you submit to us could be used against you in a matter, and even if you submitted it in a good faith effort to retain us.