Séan P. O'Brien

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, and 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 has been recognized in the Southwest Super Lawyers list for Real Estate Law.

Scott has handled numerous mediations as a Judge Pro Tem for Maricopa County Superior Courts. He is also available as a mediator and arbitrator for real estate, title, escrow, and business disputes.

Legal Updates & Firm News

Aug 16, 2024 - General

Gust Rosenfeld P.L.C. Attorneys are once again Recognized as “Best Lawyers” and “Ones to Watch” in the 2025 Edition of The Best Lawyers in Americ

Aug 23, 2023 - Press Release

The Best Lawyers in America 2024 Names Gust Rosenfeld Attorneys “Lawyer of the Year”; “Ones to Watch”; and “Best Lawyers”

Professional Recognition

• The Best Lawyers in America, Litigation - Real Estate; Real Estate Law (2020-2026)

• Southwest Super Lawyers, Real Estate Law (2012-2013 and 2025)

• Phoenix Magazine 2022 Top Lawyers - Arbitration and Mediation; Real Estate

• Featured “Innovator” in the Phoenix Business Journal (August 2009)

Presentations & Publications

•ABA’s Real Estate, Condemnation & Trust Committee Title Insurance Regional CLE Program, Host and Speaker (January 2025)

• Arizona State Bar, Real Property and Construction Law Sections (2011-present)

• Land Title Association of Arizona and Arizona State Escrow Assoc. Conferences (2008-present)

• National Business Institution: Boundary Law and Real Estate Titles (2002-present)

• National CLE Conference, Law Education Institute: Title Insurance (2007 and 2009)

• Author, Arizona Journal of Real Estate and Business: “Abstractor Liability” (2004)

• Arizona Trustee Association: Equitable Subrogation (2002 and 2012)

• Panelist, “Arizona’s Homestead and Judgment Lien Law Amendments,” State Bar Convention (2022)

Community Involvement

•Youth Sports Head Coach, including multiple Coach of the Year awards (2007-present)
•Gilbert Christian Schools (former president and board member, 2009-2014)
•Electronic Recording Commission (appointed by Governor, 2006-2007)
•Arizona Town Hall (report chairman, panel chairman, panel recorder, 2000-2009)
•Chandler-Horizon Rotary Club (former president and board member, 1998-2008)
•Actors Theatre of Phoenix (former executive committee and board member, 1998-2001)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