William O. Diab is an associate on the firm's Dispute Resolution Team and Construction Law practice. His practice focuses on resolving complex commercial and construction disputes. William is a strategic problem solver. He has experience representing publicly traded and closely held companies, shareholders, investors, officers and directors, as well as Court appointed fiduciaries in matters concerning distressed transactions and corporate malfeasance. He also routinely represents real estate developers, general contractors, and design professionals in multi-party construction defect and delay cases, as well as discrete construction frauds. William has appeared in a variety of forums including state and federal courts, bankruptcy courts, arbitration, and several matters involving multi-jurisdictional parallel actions on the national and international stage.
Outside of court, William advises real estate developers on structuring their construction and development plans. He marshals a thoughtful understanding of the risks and variables that compose a construction project and the roles of each essential player to negotiate the matrix of contractual relationships between the developer, contractor, architect, engineers, subcontractors, sureties, insurers, and governmental agencies. William is routinely asked to serve as an advisor and consultant during construction to guide his clients through on-site disputes and emergencies with the objective of keeping projects on track, reducing the likelihood of litigation, and closing out the projects smoothly.
Commercial Litigation
- Senior litigator on a team representing a Fortune 500 company in a lawsuit for specific performance to enforce a purchase option for a thirty-million-dollar property adjoining a super-regional mall resulting in Summary Judgment entered in favor of the client, which was affirmed on appeal.
- Successfully prosecuted claims on behalf of a group of victims of an international Ponzi scheme, securing substantial recovery in a mediated settlement.
- Represented seller of high-end property against buyers in an action for breach of contract due to failure to close, securing a settlement for more than eighty percent of substantial six-figure security deposit in less than six months.
- Defended manager of development company in claims asserted by minority partners for accounting and breach of fiduciary duties, achieving a dismissal of all claims.
- Defended and prosecuted counterclaims on behalf of manager of development company against a 50% partner for accounting, mismanagement, and corporate malfeasance, resulting in negotiated settlement of seven-figure buy-out in favor of client.
Construction Litigation
- Successfully prosecuted civil theft claims on behalf of foreign construction company against officers and insiders for embezzling company funds through fraudulent invoices scheme resulting in over four-million-dollar judgment.
- Represented a national fair housing developer in several contested claims against a surety after the client’s general contractor, a national company, filed for bankruptcy and abandoned three ongoing development projects, securing a substantial recovery of more than 70% of the claim in a negotiated settlement at a pre-suit mediation.
- Represented several homeowners of high-end luxury estates in litigation against general contractors and sureties for construction defects and delays.
- Defended an international architectural firm against claims for design errors and omissions and dereliction of construction administration duties resulting in allegedly millions of dollars’ worth of delays and cost overruns, settling the case at a nuisance value on favorable terms to the client.
Construction Projects
- Represents hotel development company as project consulting counsel concerning complex multi-phase development project with several construction lending and draw scheduling contracts, to assist in ensuring smooth performance and completion of project.
- Represents foreign development entity in connection with 48-unit luxury condominium development, drafting guaranteed maximum price construction contracts, and serves as project consulting counsel for the ongoing project.
- Represents state-wide community developer in drafting and negotiating contracts with all subcontractors and design professionals, and serves as project consulting counsel on several ongoing projects.
- Represents one of Florida’s largest condominium associations in drafting and negotiating contracts with contractors, engineers, and owner’s representatives, and serves as project consulting counsel for during 50-year re-certification and 30-million-dollar capital improvements.
- Represented design-builder and turn-key developer in drafting and negotiating contract suite to be used with homeowners, subcontractors, and design professionals in all aspects of client’s business.
- Miami-Dade Bar Young Lawyers Section 40 under 40 Recipient, 2024
- The Best Lawyers in America®, "Ones to Watch", 2024-2025
- Florida Super Lawyers, 'Rising Star', 2024
- Florida Bar, International Law Section
- Florida Bar, Business Law Section
- Florida Bar, Trial Lawyers Section
- Miami-Dade Bar Association
- Editor of the Middle East Review, a publication of the ABA International Law Section (2018-2021)
Fifty-Six Berger Singerman Attorneys Recognized in the 2025 Edition of Best Lawyers In America
August 15, 2024
June 9, 2022
Berger Singerman Adds Litigation, Construction, Real Estate and Insurance Law Attorneys
August 30, 2021
A Primer on Florida’s Construction Lien Law
September 22, 2021
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