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Sophisticated clients and organizations need an attorney who understands their needs and can guide them through the legal nuances of business and commercial transactions. Mr. Matteo, a shareholder, director and former President of the Firm, is that attorney. With 30 years of experience representing companies, non-profit organizations and closely held businesses, John concentrates his practice on business and commercial legal matters, including those arising in healthcare and real estate transactions. He currently chairs the Firm’s Business and Employment Law Practice Groups, and the  Trusts & Estates Practice Group. Given the prior 12 years that he served as President, John has a unique perspective on the day-to-day operations facing any business.

John has represented both sellers and purchasers in multi-million dollar acquisitions, including The Washington Club in the sale of its historic Patterson Mansion at 15 Dupont Circle, one of the largest D.C. real estate transactions to close in 2014 and the sale of the City Tavern Club in Georgetown in 2024. John also represented the National Association of Attorneys General Mission Foundation, Inc. in its sale and renovation swap of its M Street headquarters. In 2015, John was retained by Washington Home and Community Hospices for the sale of its significant real estate holdings in the District and for related restructuring issues.

In addition to these significant real estate and business transactions, John has counseled several companies and individuals on a whole range of business issues, including organizational structuring, mergers and acquisitions, stock agreements, commercial leasing, real estate, governance, workouts, bankruptcy, and employment issues. John also represents non-profit organizations on similar issues, as well as obtaining tax-exempt status and providing compliance advice with IRC 501(c) regulations. Additionally, he has significant experience with succession and estate planning issues, for businesses and their owners, including the preparation of wills, trusts, living wills, advance directives, and family LLCs.

John regularly advises hospitals, healthcare providers, and organizations on contract and real estate matters, as well as particular health law related issues. He has had the unique opportunity to serve as acting in-house counsel support to a major specialty hospital in the District of Columbia, as well as a national trade association in the healthcare field.

Professional Associations

  • Chair, D.C. Bar Continuing Legal Education Committee
  • Board Member Holy Cross Hospital Foundation (appointed in 2025)
  • Catholic Business Network of Montgomery County, Maryland
  • Greater Washington Board of Trade (Member, 1995 – 2017)
  • Former Chair and Board Member, Montgomery County Regional Advisory Board of the United Way
  • Former Board Member, United Way of the National Capital Region
  • Former Board Member, Gala Chair, SOAR!
  • March 2025
    Corporate Transparency Act Update
    In the continuing developments surrounding the implementation of the Corporate Transparency Act, on March 21, 2025, the Financial Crimes Enforcement Network (FinCEN) issued an interim final rule that removes the former requirement for U.S. persons to report beneficial ownership information (BOI to FinCEN under the Corporate Transparency Act. The definition of “reporting company” under the interim rule was ... Read More
  • October 2023
    Corporate Transparency Act: What Business Owners Need to Know
    The Corporate Transparency Act, which goes into effect on January 1, 2024, has sweeping ramifications for small businesses and their owners. This articles offers a primer on the Act’s reporting requirements, exceptions, and penalties for non-compliance. Read more here ... Read More
  • November 2021
    Business Practice Group Spotlight: Vaccine Mandates
    https://youtu.be/_gWg3jRdBU0 Firm President John J. Matteo discusses vaccine mandates & the efforts made by Jackson & Campbell's Business Law Practice Group to advise clients on evolving guidelines from the CDC. Follow our new YouTube channel for more video content from our attorneys! Jackson & Campbell, P.C.'s attorneys are among the most respected in Washington, routinely winning national awards and ... Read More
  • April 2021
    Employer-Mandated COVID-19 Vaccines: Tips, Pitfalls, and Other Considerations
    President Joe Biden recently announced that all adult Americans will be eligible for a COVID-19 vaccine by April 19. That day has arrived, and all 50 states now allow all adults age 16 and older to register for the vaccine. As the pace of vaccinations continues to accelerate, and case numbers appear to be stable in most regions of the ... Read More
  • January 2020
    Employers Receive Additional Guidance with the New Department of Labor Rule, Making It Easier to Avoid Classification as a Joint-Employer
    The Department of Labor issued a final rule on January 12, 2020 regarding the interpretation of joint employer status under the Fair Labor Standards Act (FLSA). The FLSA requires employers to pay employees the federal minimum wage for every hour worked and to pay overtime for every additional hour worked over 40 during a workweek. Liability for making such payments falls ... Read More
  • December 2019
    End of the Calendar Year: A Good Time to Confirm Compliance Issues for Businesses
    Corporations, limited liability companies (LLCs), and other business entities are certainly aware of the need to make certain end of year decisions for income tax purposes, but it also is a good time to perform a business audit for possible state, local, and personal property tax return deadlines. It is also advisable for businesses to review other corporate compliance issues, such ... Read More
  • April 2019
    Tax Filing Deadlines – A Good Time to Confirm Other Compliance Issues for Businesses
    Corporations, limited liability companies (LLCs), and other business entities are certainly aware of tax filing deadlines in the month of April, but tax season is also a good time to perform a business audit for other important dates, including applicable state and local requirements and personal property return deadlines. It is also advisable to review other corporate compliance issues, such as ... Read More
  • March 2019
    Department of Labor Proposes New Overtime Rules
    Employers will recall during the Obama administration that the salary threshold for determining overtime eligibility under the Fair Labor Standards Act was changed from $23,660 per year to $47,476.00 per year. Many employers modified their own employment policies to meet the new standard despite the federal regulations never being implemented due to a successful court challenge. The Trump administration has ... Read More
  • July 2018
    Concrete Tips for Negotiating Commercial Real Estate Leases in the District
    Join Firm President, John J. Matteo at the D.C. Bar on Tuesday, July 17 for a 2-hour CLE class.   All Communities Members Receive a $10 Discount on CLE Classes! ... Read More