Séan P. O'Brien

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Séan P. O'Brien: Attorney with Gust Rosenfeld P.L.C.
Attorney Awards
About Attorney Awards

Biography

Sean P. O’Brien is the Chair of the firm’s Litigation Practice Group and Co-Chair of the Bankruptcy, Restructuring and Creditors’ Rights Practice Group. He focuses his practice on commercial bankruptcy, restructuring, creditors’ rights, related litigation, appeals as well as mediation. Sean represents institutional clients, corporations, partnerships, and individuals in all areas of creditor and debtor relations.

Sean is an approved panel ADR mediator for the United States Bankruptcy Court. He routinely handles ADR matters in disputes dealing with commercial and consumer bankruptcy, restructuring, and creditors’ rights.

Sean is Board Certified in Business Bankruptcy Law by the American Board of Certification, an American Bar Association-accredited program. He is AV Preeminent rated by Martindale-Hubbell, representing the highest rating in legal ability and ethical standards and also recognized in the Bankruptcy and Creditor-Debtor Rights Law category of The Best Lawyers in America and Southwest Super Lawyers .

Professional Recognition

The Best Lawyers in America, Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law (2010-2026)
Southwest Super Lawyers, Bankruptcy (2010-2025)

Phoenix Magazine 2023 Top Lawyers - Bankruptcy and Reorganization

Community Involvement

•Phoenix Downtown YMCA (Executive Committee; past Chair, Board of Directors)
•CARE

(Certified Specialist in Business Bankruptcy Law by the American Board of Certification)

Areas of Practice (6)

  • Bankruptcy and Creditors' Rights
  • Litigation
  • Alternative Dispute Resolution
  • Bankruptcy
  • Restructuring
  • Creditors' Rights

Education & Credentials

University Attended:
Marquette University, B.S., Accounting, 1982
Law School Attended:
Valparaiso University, J.D., 1985
Year of First Admission:
1986
Admission:
1986, Arizona; 1987, U.S. District Court, District of Arizona and U.S. Court of Appeals, Ninth Circuit; 1998, U.S. Supreme Court
Memberships:

Professional Associations

•State Bar of Arizona
•Past Chair and Executive Committee Member, Bankruptcy Law Section
•Maricopa County Bar Association
•Bankruptcy Law Section
•American Bar Association
•American Bankruptcy Institute
•Turnaround Management Association
•Ninth Circuit Court of Appeals, Lawyer Representative (2017-2020)
•U.S. Bankruptcy Court, District of Arizona, Panel ADR Mediator (Compensated and Uncompensated)
•Arizona Celtic Bar Association
•Arizona Bankruptcy American Inn of Court (Master 2013-2015, Emeritus)

Certifications:
Certified Specialist in Business Bankruptcy Law by the American Board of Certification
ISLN:
904747162

Peer Reviews

5.0/5.0 (2 reviews)
Martindale-Hubbell® AV Preeminent Rating Badge
  • Legal Knowledge

    5.0/5.0
  • Analytical Capability

    5.0/5.0
  • Judgment

    5.0/5.0
  • Communication

    5.0/5.0
  • Legal Experience

    5.0/5.0
Peer reviews submitted prior to 2008 are not displayed.

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