Maureen L. O'Leary
About Maureen L. O'Leary
Maureen L. O'Leary is a lawyer based in Mequon, WI and has been recognized in The Best Lawyers in America® since 2021. Maureen L. O'Leary is recognized in the following practice areas:
- Mequon, Wisconsin
- Business Organizations (including LLCs and Partnerships)
- Closely Held Companies and Family Businesses Law
- Litigation - Trusts and Estates
- Tax Law
- Trusts and Estates
Current Firm: O'Leary-Guth Law Office SC
Education: Marquette University, J.D., graduated 2008
Location: Mequon, WI
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
David G. Peterson is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. David G., who practices law in Waukesha, Wisconsin, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David G. is held by other top lawyers in the same geographic and legal practice area.
William Invie Shroyer is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Real Estate Law. William Invie, who practices law in Milwaukee, Wisconsin, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William Invie is held by other top lawyers in the same geographic and legal practice area.
Rob Teuber is a Shareholder focusing his practice on tax disputes and controversies for clients nationally, regionally and locally. From a national perspective, Rob assists in resolving IRS tax audits, Tax Court litigation, personal liability assessments, tax collection matters, Offers in Compromise and foreign financial account disclosures. From a state and local perspective, he works with clients to address sales, employment, income and property tax controversies. Rob takes great pride in a...
Attorney Matthew Fernholz focuses his practice on commercial litigation, trust and fiduciary disputes, business torts, trade secrets, non-compete agreements, defamation, and appellate work. In addition, he has developed one of the preeminent political and election law practices in the State of Wisconsin, and has handled several high-profile matters, from representing candidates for statewide office, successfully challenging the Governor’s emergency powers, arguing before the Wisconsin E...
Chris Koehnke is a Shareholder at von Briesen & Roper, s.c. focusing on restructuring, insolvency, and commercial litigation. Chris represents lenders and other creditors with respect to the following: Representing secured creditors and other lenders in all stages of bankruptcy litigation Representing creditors in State Court Chapter 128 receivership proceedings, including issues related to lien priority, asset disposition, and settlement of preference claims Guiding clients through the p...
Zachary Flood is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance and Litigation - Labor and Employment. Zachary, who practices law in Milwaukee, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Zachary is held by other top lawyers in the same geographic and legal practice area.
Sally Piefer is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Labor Law - Management. Sally, who practices law in Milwaukee, Wisconsin, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sally is held by other top lawyers in the same geographic and legal practice area.
William H. Tobin is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. William H., who practices law in Milwaukee, Wisconsin, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William H. is held by other top lawyers in the same geographic and legal practice area.
Kelly Noyes is a Shareholder and co-Chair of the Class Actions Section. Kelly has significant experience in complex business litigation, particularly in the areas of ERISA and health care billing and collections. Kelly pairs her knowledge of the law with a passion for understanding her clients’ businesses, so she can achieve cost-effective resolutions to clients’ problems, both in and out of the courtroom. She has particular experience in the ERISA, benefits, and health care secto...
Scott Wade is a Shareholder in the firm’s Labor and Employment Section. He focuses his practice on Worker’s Compensation and is the Chair of the firm’s Worker’s Compensation Section. Scott is a frequent author and presenter on Wisconsin worker’s compensation and is a contributing author to Wisconsin Association of Worker’s Compensation Attorneys Case Law Update.
Explore and Learn
The Family Law Loophole That Lets Sex Offenders Parent Kids
by Bryan Driscoll
Is the state's surrogacy framework putting children at risk?
Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore
by Jamilla Tabbara
Market drivers, diversity trends and the elite practitioners shaping the legal landscape.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Can a Green Card Be Revoked?
by Bryan Driscoll
Revocation requires a legal basis, notice and the chance to respond before status can be taken away.
New Texas Family Laws Transform Navigating Divorce, Custody
by Bryan Driscoll
Reforms are sweeping, philosophically distinct and designed to change the way families operate.
How Far Back Can the IRS Audit You?
by Bryan Driscoll
Clear answers on IRS statutes of limitations, recordkeeping and what to do if you are under review.
US Tariff Uncertainty Throws Canada Into Legal Purgatory
by Bryan Driscoll
The message is clear: There is no returning to pre-2025 normalcy.
The 2026 Best Lawyers Awards in Chile, Colombia and Puerto Rico
by Jamilla Tabbara
The region’s most highly regarded lawyers.
Can You File Bankruptcy on Credit Cards
by Bryan Driscoll
Understanding your options for relief from overwhelming debt.