Hamilton O'Neill - Miami, FL

Premier High-Net-Worth Divorce and Family Law in Miami

Located in the Chase Bank Building at 150 SE 2nd Avenue in Downtown Miami, Hamilton O'Neill is a distinguished boutique family law practice representing successful entrepreneurs, corporate executives, physicians, attorneys, professional athletes, and public figures. Founded by prominent matrimonial attorney Kathryn DeVane Hamilton alongside partner William J. O'Neill, the firm brings more than five decades of combined legal experience to high-stakes domestic relations matters. Recognized by Best Lawyers in America, Florida Super Lawyers, and ranked among Best Law Firms by U.S. News and World Report, Hamilton O'Neill maintains a highly selective caseload to ensure every client receives discreet, bespoke advocacy. When high-profile spouses or business owners need to hire an attorney with uncompromising discretion and trial-tested authority, Hamilton O'Neill delivers exceptional legal leadership.

Specialized Family Law and Matrimonial Practice Areas

Hamilton O'Neill dedicates its entire practice to family and matrimonial law, providing aggressive representation in trial courtrooms and sophisticated negotiation at the mediation table. Clients seeking to find an attorney with exceptional financial and courtroom capabilities turn to the firm across core practice areas:

• Divorce lawyers representation: Serving as premier divorce lawyers handling contested dissolution of marriage, jurisdictional challenges, and private settlement negotiations for affluent spouses.
• Complex asset division and business valuation: Collaborating with forensic accountants and valuation experts to untangle executive compensation, private equity holdings, offshore accounts, real estate portfolios, and closely held corporate interests.
• Prenuptial agreement lawyers counsel: Crafting ironclad prenuptial and postnuptial agreements as prenuptial agreement lawyers to protect generational wealth, family trusts, and prospective business assets.
• Child custody lawyers advocacy: Acting as compassionate child custody lawyers to establish parenting plans, resolve relocation disputes, and safeguard the best interests of children in complex cross-border custody conflicts.
• Child support and alimony litigation: Serving as diligent child support lawyers litigating substantial spousal maintenance, deviations from child support guidelines, and modification proceedings.
• Domestic violence lawyers representation: Serving as decisive domestic violence lawyers representing clients in petitioning for or defending against protective injunctions during contentious matrimonial proceedings.

Sophisticated Financial Mastery in Marital Dissolution

High-net-worth divorces require financial acumen on par with complex commercial litigation. Attorney William J. O'Neill brings decades of transactional background in real estate, corporate construction, and critical infrastructure, complementing Kathryn DeVane Hamilton's extensive family trial court leadership. The firm routinely manages disputes involving hidden assets, complex tax implications, dissipation of marital funds, and the division of sophisticated financial instruments. While the firm strives for amicable, private resolutions that minimize public exposure and emotional friction, its partners are formidable courtroom litigators prepared to defend their clients' financial entitlements at trial.

Unwavering Discretion and Client-Centered Strategy

At Hamilton O'Neill, client privacy and reputation management are paramount. Matrimonial transitions carry deep emotional, professional, and financial consequences. Clients seeking to consult an experienced lawyer or find an attorney who understands the nuances of high-stakes divorce receive tailored attention, responsive communication, and comprehensive strategic counsel. Hamilton O'Neill protects what matters most-client families, legacies, and financial stability.