Administrative Hearings & Appeals
Mark Wisniewski
Partner
Mark is a partner on Berger Singerman’s Business, Finance & Tax team in Fort Lauderdale. He is both a tax lawyer and a corporate transactional lawyer, bringing an integrated perspective that enhances the quality and efficiency of his advice in both disciplines. He represents high‑net‑worth individuals and businesses in federal tax and business planning, including the formation and use of closely held entities, tax planning for loan modifications and workouts, wealth transfer strategies, private equity transactions, and the formation and governance of not‑for‑profit organizations (private foundations and public charities), as well as charitable giving matters.
As a transactional tax and corporate lawyer, Mark delivers practical, client‑focused counsel that aligns tax efficiency with business objectives including without limitation in respect to: (i) executive compensation (cash‑based and equity plans, nonqualified deferred compensation, change‑in‑control and severance arrangements, and executive employment agreements); (ii) pre‑transaction planning; (iii) choice of entity; (iv) mergers and acquisitions; and (v) private equity fund formation.
Mark has significant experience drafting limited liability company and partnership agreements for joint ventures acquiring multifamily/apartments, condominium projects, shopping centers, office buildings, and hotels, and in drafting cash‑based and equity compensation plans. His dual expertise allows him to anticipate intersecting tax and deal issues, streamline execution, mitigate risk, and deliver superior outcomes for clients.
Representative Matters 
- Representation of numerous companies and individuals in connection with disputes with the Internal Revenue Service
- Tax, estate planning and asset protection planning for high net worth individuals
- Drafting complex partnership agreements, operating agreements, and shareholders' agreements
- Structuring and drafting documents for transactions involving asset sales and stock sales
Community Activities / Associations
- Funding Arts Broward, Inc.
- Board Member
- Steering Committee Member
- Community Foundation of Broward County Annual Joint Tax & Estate Planning Seminar
- Steering Committee Member
- Estate Planning Council of Broward County
- Board Member
In the News
March 12, 2024
Berger Singerman Adds Corporate and Federal Tax Law Attorney Mark Wisniewski as Partner
October 4, 2016
Publications
November 5, 2024
Client Alert - COVID-19: SBA Loan Programs for Florida Small Businesses
March 23, 2020
Doing Business in Florida Blog
March 26, 2025
March 6, 2024
November 30, 2023
October 18, 2023
October 7, 2022
June 19, 2020
April 5, 2020
High-Tech Start-Ups Get Relief From Latest Opportunity Zone Proposed Treasury Regulations
April 17, 2019
Tax Breaks for Investment in Opportunity Zones – Proposed Treasury Regulations
October 29, 2018
Tax Aspects of Qualified Opportunity Zone Funds – A Prequel
August 28, 2018
Impact of Tax Reform Act on Parties to Litigation
April 1, 2018
The New Deduction for Pass-Through Entities and Sole Proprietorships
January 21, 2018
December 25, 2017
U.S. Taxation of Convertible Virtual Currency - It Is Not a Myth!
November 29, 2017
To "C" or Not To "C"? A Triumph of S-Election Form Over Substance
April 24, 2017
Prior Affiliations
- Shuffield, Lowman & Wilson, P.A.
- Comiter, Singer, Baseman & Braun, LLP
- Liebowitz & Associates, P.A.
- Bienstock & Clark, P.A.