Atty. Dan O'Neil

Atty. Dan O'Neil

Dan O’Neil focuses his practice on employee benefits and executive compensation matters with an emphasis on corporate transactions. Dan has experience with employee benefit and executive compensation due diligence, negotiation of the related provisions in transaction agreements and assists clients with issues relating to sections 280G, 162(m) and 409A of the Code.

Boston Boston 15 yrs experience 15 year
Call (617) 912-1800 Book Appointment

Profile Summary

About Dan O'Neil at a glance

Dan O'Neil is a employment and m&a attorney based in Boston, Massachusetts, practicing at Paul Hastings LLP. They have 15+ years of legal experience, licensed to practice since 2011. Admitted to practice in Massachusetts, Massachusetts Bar Association (2011). Recognitions include Best Lawyers in America — Employee Benefits (ERISA) Law (2026), Best Lawyers in America — Mergers and Acquisitions Law (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Dan O’Neil focuses his practice on employee benefits and executive compensation matters with an emphasis on corporate transactions
  • Dan has experience with employee benefit and executive compensation due diligence, negotiation of the related provisions in transaction agreements and assists clients with issues relating to sections 280G, 162(m) and 409A of the Code
  • Dan is also experienced in a wide range of tax and benefits issues, including day-to-day retirement plan compliance, ERISA fiduciary matters, prohibited transactions and plan design
  • His writing has been featured in Benefits Quarterly
  • Read full biography: https://www.mwe.com/people/dan-oneil/

Practice Areas Explained

Dan O'Neil's Areas of Practice

Each practice area below reflects the types of cases Dan O'Neil handles, with a brief overview of what that area of law covers.

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

Dan O'Neil is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in Massachusetts →

Mergers & Acquisitions

Dan O'Neil is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Massachusetts →

Jurisdictional Context

Why local counsel matters in Massachusetts

Practicing law in Massachusetts. Legal matters in Massachusetts are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Boston are typically filed in the local municipal court or the appropriate Massachusetts state district court, depending on subject matter and amount in controversy. An attorney licensed in Massachusetts brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Massachusetts courts without local counsel or pro hac vice admission.

Looking for additional Massachusetts attorneys? Browse all attorneys in Boston or all attorneys in Massachusetts.

Frequently Asked

Common questions about Dan O'Neil

Where is Dan O'Neil's law office located?
Dan O'Neil's law practice is located in Boston, Massachusetts. The firm is Paul Hastings LLP. You can contact the office directly through this profile page.
What practice areas does Dan O'Neil handle?
Dan O'Neil focuses on employment, m&a. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has Dan O'Neil practiced law?
Dan O'Neil has 15+ years of legal experience and has been licensed since 2011.
How can I contact Dan O'Neil for a consultation?
You can contact Dan O'Neil directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Dan O'Neil received?
Dan O'Neil's notable recognition includes: Best Lawyers in America — Employee Benefits (ERISA) Law; Best Lawyers in America — Mergers and Acquisitions Law; Best Lawyers in America — Additional Areas of Practice:; Best Lawyers in America — Corporate Governance and Compliance Law.

Awards

Best Lawyers in America — Employee Benefits (ERISA) Law
- 2026
Best Lawyers in America — Mergers and Acquisitions Law
- 2026
Best Lawyers in America — Additional Areas of Practice:
- 2026
Best Lawyers in America — Corporate Governance and Compliance Law
- 2026

Bar Admissions

Massachusetts, Massachusetts Bar Association
Admitted: 2011

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