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John L. Mascialino heads the firm's New York Government Law & Policy Practice. He focuses his practice on administrative law, government affairs, government contracts, government investigations, and government-related real estate matters. John counsels private and publicly owned companies and not-for-profit organizations on state and local regulatory, legal, and policy matters with a focus on the clients' strategic objectives and provides advice on matters that will enhance their business opportunities in the city and state of New York.

John advises on all aspects of the government contracting process including but not limited to: competitive bids and RFP responses and compliance, bid and RFP protests and administrative challenges, contract negotiation, vendor responsibility and integrity issues, as well as government litigation.

John has also previously served as the co-hiring chair for the firm’s New York Office and as the co-career development liaison responsible for the professional development of its associates.

John spent several years working in City government, serving as First Deputy Commissioner of the Department of Citywide Administrative Services (DCAS), where he was responsible for procurement of city equipment and supplies and in charge of many city real estate assets. Prior to that, John was Counsel/Deputy Chief of Staff for the Office of the Deputy Mayor for Operations, where he assisted in the supervision of many City operational agencies, was a mayoral appointee to the Franchise Concession Review Committee (FCRC), and also served as Deputy General Counsel of the Mayor's Office of City Legislative Affairs.


  • Administrative law
  • Government relations
  • Government contracts/procurement
  • Government investigations
  • Bid protests and litigation
  • Concessions and franchises
  • Housing/economic development
  • Legislative counsel
  • Regulatory issues
  • Lobby compliance issues



  • Representation of major consulting and software companies with technology procurements by various New York City and New York State governmental agencies and public authorities.
  • Representation of major real estate developers in obtaining economic incentive packages from New York City and New York State, including tax exempt financing and abatement programs.
  • Representation of commercial and retail property owners with government leasing transactions.
  • Representation of major companies with existing government contracts, including contract negotiations, bid protests and appeals before governmental agencies, contract disputes, registration and budget appropriations.
  • Representation of a transportation technology company with contracts in several cities in the United States, including New York City and Philadelphia, specializing in the taxi and livery car industries.
  • Representation of NYC-based franchises, concession, and revocable consent agreements.
  • First Deputy Commissioner, New York City Department of Citywide Administrative Services 2000-2001
  • Deputy Chief of Staff/Counsel, Office of the Deputy Mayor for Operations, 1998-2000
  • Deputy General Counsel, Mayor's Office of City Legislative Affairs, 1997-1998
  • Director of Legislative and Public Affairs, New York City Department of Employment, 1996-1997

Recognition & Leadership

  • Selected, City & State, "Manhattan Power 100," 2021-2023
  • Team Member, City & State, "Top 50 NYC Lobbyists," 2021 
  • Selected, City & State New York, "50 Over 50," 2021  
  • Listed, Super Lawyers magazine, New York Metro Super Lawyers, 2012-2019
  • Team Member, Best Lawyers in America® "Top Listed – Government Relations," 2018
  • Team Member, a U.S. News - Best Lawyers® "Government Relations Law Firm of the Year," 2014
  • Recipient, "2005 Easter Seals New York Board Leadership Award," Board of Directors, Easter Seals New York, November 2005
  • Board Member, Queens Chamber of Commerce, 2023-Present
  • Trustee, Riverside Park Conservancy, March 2016-Present
    • Vice Chair, 2019-Present
    • Board Secretary, 2018-Present
    • Member, Executive Committee, 2018-Present
  • Past Board Member, Riverside Clay Tennis Association     
  • Board Member, Grand Central Partnership and Grand Central District Management Association, 2008-Present
    • Treasurer, 2017-Present
    • Chair, Finance Committee, 2017-Present
  • Board Member, FEDCAP Rehabilitation Services Inc., 2015-2019
  • Easter Seals New York, Board of Directors
    • Board Member, 2006-2018
    • Chairman, 2008-2010 and October 2015-2016
    • Vice Chairman, Board of Directors, 2006-2008
    • Chair, NYC Regional Board, 2006-2008
  • Board Member, Easter Seals New Hampshire, 2008-2010
  • Member, New York State Bar Association


  • J.D., New York Law School
    • NYLS Alumni Mentor Association
  • B.A., History, St. Francis College
  • New York