Stephen L. Jantzen

Stephen L. Jantzen
Firm: Ryan Whaley Coldiron Shandy PLLC
Address: 119 N. Robinson Avenue, Ste. 900
Oklahoma City, OK 73102
Phone: (405) 239-6040
Fax: (405) 239-6766
E-mail: Contact Us
Web site:

Position Areas of Practice Litigation Percentage
Bar Admissions Education Affiliations
Lawyer Profile:

In addition to a J.D., Stephen Jantzen earned an LL.M. in Environmental Law from The George Washington University in Washington, D.C. He is a former Assistant Attorney General for the State of Oklahoma, having practiced in the Environmental Protection Unit of the Oklahoma Attorney General's office, where he represented and advised state agencies and engaged in litigation enforcing Oklahoma's environmental statutes. His practice involves projects and litigation around the United States, and he has represented clients in litigation or regulatory matters relating to sites in Oklahoma, New Mexico, Arkansas, Kansas, Texas, Washington, and Arizona. He has also practiced before numerous regulatory agencies, including the United States Environmental Protection Agency, the United States Nuclear Regulatory Commission, and the Federal Energy Regulatory Commission, as well as various state environmental agencies.

Projects on which he has worked have involved:

Radioactivity, including NORM

Decommissioning of nuclear facilities, refineries, gas plants, oil and gas exploration and production

Water discharge and waste permitting

Pipeline breaks


Pipeline and crude oil storage land transactions

Municipal separate storm sewer systems (MS4s)

Industrial discharges and pretreatment standards

Lagoon closures

Stormwater permitting and compliance

Linear construction

Real estate transactions


Uranium, sand, and gypsum mining activities

Hazardous substance sites

Groundwater permitting

Concentrated animal feeding operations

Landfill operations

He has advised clients on multiple Superfund sites around the region (including the Coastal Radiation Services Superfund Site, the Brine Service Company Superfund Site, the Double Eagle Refinery Superfund Site, and the Hudson Refinery Superfund Site). He has also advised multiple clients on sites contaminated by polychlorinated biphenyls (PCBs) and chlorides. He has been recognized as an Oklahoma Super Lawyer for 2008, 2009, and 2010.

Current Employment Position(s):

Areas of Practice:
Energy & Environment
Litigation Percentage:
30% of Practice Devoted to Litigation
Bar Admissions:
Oklahoma, 1994
George Washington University National Law Center, Washington, District of Columbia, 1996
LL.M., Master of Law(s)
Major: Environmental Law

Oklahoma City University School of Law, Oklahoma City, Oklahoma, 1994
J.D., Doctor of Jurisprudence
Honors: summa cum laude

Westminster College, Fulton, Missouri
Major: Economics

Professional Associations and Memberships:
Oklahoma Bar Association

Past Employment Positions:
State of Oklahoma, Office of the Attorney General, Assistant Attorney General

Birth Information:
West Practice Categories:
Energy Law, Environmental Law, Litigation & Appeals

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