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Mark W. Maguire, born Oklahoma City, Oklahoma, 1963; admitted to bar, 1989, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Muscogee (Creek) Nation Tribal District Court; Osage Nation Tribal District Court. Preparatory education, Oklahoma State University (B.S., 1986); legal education, University of Oklahoma College of Law (J.D., 1989). Honor Societies: Omicron Delta Kappa; Phi Kappa Phi; Phi Eta Sigma; Blue Key. Selected, American Academy of Trial Attorneys, 2015. Named in: Oklahoma Super Lawyers® Personal Injury, 2017-2019. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; Oklahoma Association of Defense Counsel; International Association of Defense Counsel (Trial Academy); Defense Research Institute (DRI™); American Board of Trial Advocates; American Inns of Court. (AV Preeminent® Martindale-Hubbell® Peer Rated for Highest Level of Professional Excellence). E−Mail: Mark W. Maguire




Laws of Practice

General Civil Trial and Appellate Practice • Insurance Coverage and Bad Faith • Negligence Law • Products Liability • Medical and Legal Malpractice • Securities Law • Oil & Gas Law • Commercial Law • Employment Law • Civil Rights Law • Native American Law • Litigation • Mediation

Address

1500 ParkCentre
525 South Main Street
Tulsa, Oklahoma 74103

Phone

Telephone: (918) 582-8877
Facsimile: 585-8096

Email

Website

REPRESENTATIVE CLIENTS:

Allstate Insurance Co.; Allstate Indemnity Co.; Allstate Property and Casualty Co.; American National Property & Casualty Co.; Bank of Commerce; Boys Scouts of America; Chartis Insurance; Crum & Foster Insurance Co.; Encompass Insurance Co.; Grand River Dam Authority; Goodville Mutual Insurance Co.; Hartford Insurance Co.; Helmerich & Payne, Inc.; Hudson Insurance Group; Ion Laboratories, Inc.; Liberty Mutual Insurance Co.; Medical Protective Co.; Muscogee Creek Nation; Muscogee Creek Nation Office of Public Gaming; National American Insurance Co.; NCMIC Insurance Group; Nationwide Insurance Co.; Northbrook Property & Casualty; Oklahoma Attorneys Mutual Insurance Company; Physicians Liability Insurance Co.; State Farm Fire & Casualty Co.; State Farm Mutual Automobile Insurance Co.; Underwriters of Lloyd's of London; Union Carbide; United Services Automobile Association; Utica Mutual Insurance Co.; YRC, Inc.

AV®, AV Preeminent®, Martindale-Hubbell Distinguished℠ and Martindale-Hubbell Notable℠ are certification marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.
Martindale-Hubbell® is the facilitator of a peer review rating process. Ratings reflect the anonymous opinions of members of the bar and the judiciary. Martindale-Hubbell® PEER REVIEW RATINGS™ fall into two categories — legal ability and general ethical standards.



ATKINSON, BRITTINGHAM, GLADD, FIASCO & EDMONDS
A Professional Corporation
Telephone: (918) 582-8877
Facsimile: (918) 585-8096
E-Mail:Send E-mail
Website: www.abg-oklaw.com
1500 ParkCentre
525 South Main Street
TULSA, OKLAHOMA 74103-4524
General Civil Trial and Appellate Practice • Insurance Coverage
and Bad Faith • Negligence Law • Products Liability • Medical and
Legal Malpractice • Securities Law • Oil & Gas Law • Commercial Law •
Employment Law • Civil Rights Law • Native American Law • Litigation • Mediation

    Michael P. Atkinson, born Fort Worth, Texas, 1946; admitted to bar, 1972, Oklahoma. Preparatory education, Westminster College; University of Oklahoma (B.A., 1968); legal education, University of Oklahoma College of Law (J.D., 1972); University of Texas School of Law (LL.M., 1975). American Inns of Court (Master Emeritus, W. Lee Johnson Inn of Court). Assistant Adjunct Professor of Law, University of Tulsa College of Law, 1976. Faculty, Insurance Counsel Trial Academy, 1986. Listed in: The Best Lawyers in America®, since 1991. Named in: Oklahoma Super Lawyers®, 2006-2021. Member: Tulsa County Bar Association; Oklahoma Bar Association. Fellow: American College of Trial Lawyers; International Academy of Trial Lawyers; American Board of Trial Advocates (Diplomate). E−Mail: Michael P. Atkinson
    Galen L. Brittingham, born Nevada, Missouri, 1954; admitted to bar, 1987, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, Missouri State University (B.S., 1976); Central Missouri State University (M.S., 1983); legal education, Washburn University School of Law (J.D., with honors, 1987). Washburn University Law Review, 1985-1987. Listed in: The Best Lawyers in America®, since 2013. Selected, "Lawyer of the Year Award" for Insurance Law, by Best Lawyers®, Tulsa, Oklahoma, 2022. Member: Tulsa County Bar Association; Oklahoma Bar Association. E−Mail: Galen L. Brittingham
    John S. Gladd, born Kansas City, Missouri, 1961; admitted to bar, 1987, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, Oklahoma State University (B.S., 1983); legal education, University of Tulsa College of Law (J.D., 1987). Fraternity: Delta Theta Phi. Named in: Oklahoma Super Lawyers®, 2007-2021; National Super Lawyers Magazine® for Corporate Law, 2006-2017. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; Oklahoma Association of Defense Counsel; International Association of Defense Counsel (Trial Academy); Defense Research Institute (DRI™); American Board of Trial Advocates. E−Mail: John S. Gladd
    William A. Fiasco, born Los Angeles, California, 1961; admitted to bar, 1988, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, University of Oklahoma (B.A., 1983); legal education, University of Oklahoma College of Law (J.D., 1988). Ungerman Scholar. Recipient: Albert C. Hunt Practice Award; American College of Trial Lawyers Scholar. Named in: Oklahoma Super Lawyers®, 2006-2021. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; Oklahoma Association of Defense Counsel; Federation of Defense and Corporate Counsel; Defense Research Institute (DRI™); American Board of Trial Advocates. Fellow: American College of Trial Lawyers. E−Mail: William A. Fiasco
    James N. Edmonds, born Paola, Kansas, 1961; admitted to bar, 1993, Oklahoma; 2019, Kansas; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, University of Kansas (B.A., 1987; M.A., 1990); legal education, University of Kansas School of Law (J.D., 1993). Listed in: The Best Lawyers in America®, Insurance Law, since 2020. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association. E−Mail: James N. Edmonds
    Mark W. Maguire, born Oklahoma City, Oklahoma, 1963; admitted to bar, 1989, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Muscogee (Creek) Nation Tribal District Court; Osage Nation Tribal District Court. Preparatory education, Oklahoma State University (B.S., 1986); legal education, University of Oklahoma College of Law (J.D., 1989). Honor Societies: Omicron Delta Kappa; Phi Kappa Phi; Phi Eta Sigma; Blue Key. Selected, American Academy of Trial Attorneys, 2015. Named in: Oklahoma Super Lawyers® Personal Injury, 2017-2019. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; Oklahoma Association of Defense Counsel; International Association of Defense Counsel (Trial Academy); Defense Research Institute (DRI™); American Board of Trial Advocates; American Inns of Court. (AV Preeminent® Martindale-Hubbell® Peer Rated for Highest Level of Professional Excellence). E−Mail: Mark W. Maguire
    Carol J. Allen, born New York, New York, 1965; admitted to bar, 1999, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Muscogee (Creek) Nation Tribal Court. Preparatory education, Northeastern State University (B.S., Criminal Justice, 1995); legal education, University of Tulsa College of Law (J.D., 1998). Recipient, CALI Excellence for the Future Awards, 1998. Selected: Top Lawyer in Bankruptcy, Tulsa Commerce & Legal News; Top Lawyer in Oklahoma, The Legal Network, 2013 and 2015; Top 10 Attorney Award, National Academy for Bankruptcy Attorneys, 2014. Member: Tulsa County Bar Association; Oklahoma Bar Association. (AV Preeminent® Martindale-Hubbell® Peer Rated for Highest Level of Professional Excellence). E−Mail: Carol J. Allen
    J. Andrew Brown, born Springfield, Missouri, February 9, 1977; admitted to bar, 2009, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Supreme Court of the United States Cherokee Nation. Preparatory education, Northeastern Oklahoma State University (B.B.A., Finance, 2002); legal education, University of Tulsa College of Law (J.D., 2009). Fraternity: Phi Delta Phi. Named in: Oklahoma Super Lawyers® 'Rising Star' edition, 2014-2019. Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; Oklahoma Association of Defense Counsel; Defense Research Institute (DRI™). E−Mail: J. Andrew Brown
    Keith B. Bartsch, born Ardmore, Oklahoma, 1960; admitted to bar, 2008, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Muscogee (Creek) Nation Tribal District Court; Chickasaw Nation Tribal District Court; Cherokee Nation Tribal District Court; Choctaw Nation Court. Preparatory education, The Citadel (B.S., with departmental honors, 1982); legal education, University of Tulsa College of Law (J.D., with honors, 2008). Dean's List. Fraternity: Phi Alpha Delta. Tulsa Law Review. Recipient: Native American Law Certificate; Sanditen Memorial Award; Belsky Award for Public Interest Law; Marcy Lawless Service Award, University of Tulsa; CALI Award for Insurance Law; CALI Award for Selling and Leasing; Merit Scholarship. Member: Tulsa County Bar Association; Oklahoma Bar Association; Federal Bar Association; Muscogee (Creek) Nation Bar Association (Former President); Oklahoma Indian Bar Association; International Association of Defense Counsel; Christian Legal Society; Disabled American Veterans. Fellow: Oklahoma Bar Foundation. E−Mail: Keith B. Bartsch
    Wynoka Middleton McClellan, born Garden City, Kansas, 1991; admitted to bar, 2016, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, Wright State University (B.S., Business, 2012); legal education, University of Tulsa College of Law (J.D., with highest honors, 2016). Order of the Curule Chair. Tulsa Law Review, 2014-2016. Recipient, CALI Award for Excellence in Copyright in the Digital Age. Member: Oklahoma Bar Association. E−Mail: Wynoka Middleton McClellan
    Kristopher K. McVay, born Oklahoma City, Oklahoma, 1987; admitted to bar, 2017, Oklahoma; also admitted to practice before U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Muscogee (Creek) Nation Tribal Court; Osage Nation Tribal Court; Cherokee Nation Tribal District Court. Preparatory education, Oklahoma State University (B.A., Sociology, 2011); legal education, University of Tulsa College of Law (J.D., with highest honors, 2017). Editorial Board, Tulsa Law Review, 2016-2017. Member: Oklahoma Bar Association. E−Mail: Kristopher K. McVay
ASSOCIATES
    Kirsten L. Palfreyman, born Tulsa, Oklahoma, 1983; admitted to bar, 2011, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma; Cherokee Nation Tribal Court. Preparatory education, Oklahoma State University (B.S., Management, magna cum laude, 2004); University of Tulsa (M.B.A., 2011); legal education, University of Tulsa College of Law (J.D., 2011). Named in: Oklahoma Super Lawyers® 'Rising Star' edition, 2015-2021. Member: Oklahoma Bar Association. E−Mail: Kirsten L. Palfreyman
    Raymond "Trey" Purdom, born Haskell, Oklahoma, 1992; admitted to bar, 2018, Oklahoma; also admitted to practice before Osage Nation Tribal Court; Cherokee Nation Tribal Court. Preparatory education, Northwestern Oklahoma State University (B.A., Political Science, 2014); legal education, University of Tulsa College of Law (J.D., with honors, 2018). Editorial Board, Tulsa Law Review, 2017-2018. Member: Oklahoma Bar Association. E−Mail: Raymond "Trey" Purdom
    Thomas H. Gayle, Jr., born Lake Charles, Louisiana, 1981; admitted to bar, 2007, Illinois; 2008, Louisiana; 2018, Oklahoma. Preparatory education, Louisiana State University (B.S., Business Administration, 2003); legal education, Loyola Chicago School of Law (J.D., 2007). Health Law Society (Loyola Chicago). Named in: Illinois Super Lawyers® 'Rising Star' edition, 2016, 2017 and 2018. Member: Oklahoma Bar Association; Workers' Compensation Lawyers Association (Past Chairman, Young Lawyers Section). E−Mail: Thomas H. Gayle, Jr.
OF COUNSEL
    K. Clark Phipps, born Norman, Oklahoma, 1957; admitted to bar, 1986, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, University of Oklahoma (B.S., 1980); legal education, Tulane University Law School (J.D., cum laude, 1986). Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; American Association for Justice (Past President); International Association of Defense Counsel; Defense Research Institute (DRI™); American Board of Trial Advocates. E−Mail: K. Clark Phipps
    Martha J. Phillips, born Ranger, Texas, 1949; admitted to bar, 1986, Oklahoma; also admitted to practice before U.S. Court of Appeals, Tenth Circuit; U.S. District Court, Northern, Eastern and Western Districts of Oklahoma. Preparatory education, Oklahoma State University (B.S., 1971); University of Oklahoma (B.S., 1978); legal education, University of Tulsa College of Law (J.D., 1986). Fraternity: Delta Theta Phi. Certified Physician Assistant. Certified Medical Technologist, American Society of Clinical Pathologist (ASCP). Member: Tulsa County Bar Association; Oklahoma Bar Association; American Bar Association; International Association of Defense Counsel (Trial Academy); Defense Research Institute (DRI™). E−Mail: Martha J. Phillips
REPRESENTATIVE CLIENTS: Allstate Insurance Co.; Allstate Indemnity Co.; Allstate Property and Casualty Co.; American National Property & Casualty Co.; Bank of Commerce; Boys Scouts of America; Chartis Insurance; Crum & Foster Insurance Co.; Encompass Insurance Co.; Grand River Dam Authority; Goodville Mutual Insurance Co.; Hartford Insurance Co.; Helmerich & Payne, Inc.; Hudson Insurance Group; Ion Laboratories, Inc.; Liberty Mutual Insurance Co.; Medical Protective Co.; Muscogee Creek Nation; Muscogee Creek Nation Office of Public Gaming; National American Insurance Co.; NCMIC Insurance Group; Nationwide Insurance Co.; Northbrook Property & Casualty; Oklahoma Attorneys Mutual Insurance Company; Physicians Liability Insurance Co.; State Farm Fire & Casualty Co.; State Farm Mutual Automobile Insurance Co.; Underwriters of Lloyd's of London; Union Carbide; United Services Automobile Association; Utica Mutual Insurance Co.; YRC, Inc.
AV®, AV Preeminent®, Martindale-Hubbell Distinguished℠ and Martindale-Hubbell Notable℠ are certification marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.
Martindale-Hubbell® is the facilitator of a peer review rating process. Ratings reflect the anonymous opinions of members of the bar and the judiciary. Martindale-Hubbell® PEER REVIEW RATINGS™ fall into two categories — legal ability and general ethical standards.

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