×
Go back to Martindale-Avvo ➔
Séan P. O'Brien
Pro

Séan P. O'Brien

5.0
2 reviews

One E. Washington Street, Suite 1600, Phoenix, AZ 85004-2553

Bankruptcy and Creditors' Rights, Litigation, Alternative Dispute Resolution and 3 more

About 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

 

Séan P. O'Brien (Phoenix, Arizona) View website

Awards

AV Preeminent Peer Rated
This elite award is granted to attorneys who have been recognized by their peers for their very high ethical standards, with an average peer review score of 4.5 or higher.
Martindale-Hubbell Peer AV

Client Champion Awards

Client Champion awards recognize those attorneys who excel at service as affirmed by their clients. The awards, based on the quantity and quality of an attorney’s Martindale-Hubbell client reviews, demonstrate an ongoing commitment to delivering excellent client service. Award recipients stand out from their peers with a platinum, gold or silver icon.

Champion Badge Silver

At least three reviews and a score of 4.0 or higher.

Champion Badge Gold

At least six reviews and a score of 4.2 or higher.

Champion Badge Platinum

At least ten reviews and a score of 4.5 or higher.

Martindale Peer Awards

A lawyer who receives a minimum threshold of qualifying responses from fellow attorneys can qualify for one of three prestigious Martindale-Hubbell Peer Review Ratings:

Martindale-Hubbell Peer AV Preeminent Rating

AV Preeminent®: The highest peer rating standard. This rating signifies a large number of the lawyer’s peers rank him or her at the highest level of professional excellence for their legal knowledge, communication skills and ethical standards.

Séan P. O'Brien got this award in 2021

Martindale-Hubbell Peer Distinguished Rating

Distinguished: An excellent rating for a lawyer with some experience. This rating indicates the attorney is widely respected by their peers for high professional achievement and ethical standards.

Martindale-Hubbell Peer Notable Rating

Notable: This rating indicates that the lawyer has been recognized by a large number of their peers for strong ethical standards.

Avvo Awards

Avvo Top Contributor

Avvo Top Contributor: The Avvo Top Contributor Award is granted to attorneys who have earned significant contribution points in a given year on our sister site, Avvo.com. Contribution points are earned by answering questions in Q&A, publishing Legal Guides, and other useful contributions to the Avvo community.

Avvo Client Choice

Avvo Client’s Choice: The Avvo Client's Choice Award Badge is granted to attorneys with a significant number of 4+ star reviews in a given year.

Reviews for Séan P.

Have you consulted or hired this lawyer?

Leave a review about your experience with this lawyer.

Write a Review

Overall Rating
5.0
See All Reviews
2
Lawyers.com
Not yet reviewed
5.0
Martindale
2
Avvo
Not yet reviewed

Services

Areas of Law

  • Litigation
  • Alternative Dispute Resolution
  • Bankruptcy
  • Other 3
    • Bankruptcy and Creditors' Rights
    • Restructuring
    • Creditors' Rights

Experience

  • Bar Admission & Memberships
    Admissions
    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)

  • Education & Certifications
    Law School
    Valparaiso University
    Class of 1985
    J.D.
    Other Education
    Marquette University
    Class of 1982
    B.S.
    Accounting
    Legal Certifications
    Certified Specialist in Business Bankruptcy Law by the American Board of Certification

Email Séan P. O'Brien

Case type is required.
A valid zip code is required.
A valid city is required.
State is required.
Country is required.
Outside the US or Canada?
Message is required.
0/1000 characters

Contact Information

First name is required.
Last name is required.
A valid email address is required.
A valid phone number is required.

By clicking the Submit button, you agree to the Terms of Use, Supplemental Terms and Privacy Policy. You also consent to be contacted at the phone number you provided, including by autodials, text messages and/or pre-recorded calls, from Lawyers.com and its affiliates and from or on behalf of attorneys you request or contact through this site. Consent is not a condition of purchase.

Thank you! Your message has been successfully sent.

For your records, a copy of this email has been sent to

Summary of Your Message
Case Type:
Zip Code or Postal Code:
City:
State:
Country:
Case Description:
Contact Information
First Name:
Last Name:
Email:
Phone Number:
Return to Profile

Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Séan P. O'Brien was admitted in 1986 to the State of Arizona.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Séan P. O'Brien is admitted to practice before the United States Supreme Court.
  • How many attorneys are in this law firm?
    Gust Rosenfeld P.L.C. has 60 attorneys at this location.
  • What law school did this attorney attend?
    Séan P. O'Brien attended Valparaiso University.
  • What year was this attorney's law firm established?
    Gust Rosenfeld P.L.C. was established in 1921.

Attorney information displayed in this FAQ section is based upon information the lawyer has included on their profile, in addition to the information we collect from state bar associations and other organizations that license legal professionals.

These FAQs include information about a lawyer's background, but do not evaluate their knowledge of the law, past performance on individual cases, personality, or communication skills.

It is solely the responsibility of lawyers and law firms to ensure that any information they provide complies with all applicable laws and rules of professional conduct.

You should be aware that the information we rely upon may not be comprehensive, or frequently updated.

Always research the lawyer further to get a better understanding of their license credentials, disciplinary status, background, and experience.

Lawyers.com Client Reviews

Martindale-Hubbell® Client Review Ratings™ display reviews submitted by individuals who have either hired or consulted the lawyers or law firms.

The Client Review Rating score is determined through the aggregation of validated responses. People who submit reviews are either individuals who consulted with the lawyer/law firm or who hired the lawyer/law firm and want to share their experience of that lawyer or law firm with other potential clients. Reviewers can be anyone who consults or hires a lawyer including in-house counsel, corporate executives, small business owners, and private individuals.

Martindale-Hubbell validates that a reviewer is a person with a valid email address. As part of the review process, respondents must affirm that they have had an initial consultation, are currently a client or have been a client of the lawyer or law firm identified, although Martindale-Hubbell cannot confirm the lawyer/client relationship as it is often confidential. The content of the responses is entirely from reviewers.

Prior results do not guarantee a similar outcome and Martindale-Hubbell accepts no responsibility for the content or accuracy of any review. For more information on Martindale-Hubbell Client Review Ratings, please visit our Client Review Page

Martindale Peer Reviews

Martindale-Hubbell® Peer Review Ratings™ are the gold standard in attorney ratings, and have been for more than a century. These ratings indicate attorneys who are widely respected by their peers for their ethical standards and legal expertise in a specific area of practice.

The Martindale-Hubbell Peer Review Ratings process is the gold standard due to its objectivity and comprehensiveness. Lawyers solicited for peer reviews include both those selected by the attorney being reviewed and lawyers independently selected by Martindale-Hubbell. All reviewers are verified as attorneys through Martindale-Hubbell’s extensive attorney database. Only attorneys practicing at least three years and receiving a sufficient number of reviews from non-affiliated attorneys are eligible to receive a Rating.

What are the different Martindale-Hubbell Peer Review Ratings?*

• AV Preeminent®: The highest peer rating standard. This rating signifies that a large number of the lawyer’s peers rank him or her at the highest level of professional excellence for their legal knowledge, communication skills and ethical standards.

• Distinguished: An excellent rating for a lawyer with some experience. This rating indicates the attorney is widely respected by their peers for high professional achievement and ethical standards.

• Notable: This rating indicates that the lawyer has been recognized by a large number of their peers for strong ethical standards.

Lawyers who have received peer reviews after 2009 will display more detailed information, including practice areas, summary ratings, detailed numeric ratings and written feedback (if available). Details for individual reviews received before 2009 are not displayed.

Attorneys that receive reviews from their peers, but not a sufficient number to establish a Martindale-Hubbell Peer Review Rating, will have those reviews display on our websites.

For more information on Martindale-Hubbell Peer Review Ratings™, please visit our Ratings Page on Martindale.com and our Frequently Asked Questions