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About me

Mr. Hannan is an attorney with experience in areas that include Contract Negotiation, Contract Drafting, Arbitration, DWI Defense, Criminal Defense, Family Law, Estate Planning, and Municipal Court Law.

Originally from Geneva, NY, Mr. Hannan’s education led him to the New York City area. He has worked with a number of organizations, some of which include the New York Mets, Sportstars, Inc., the New Jersey Nets and the law firm of Donnelly Ritigstein, LLC.

Possessing an unwavering and relentless work ethic, Mr. Hannan graduated Cum Laude from Fordham University School of Law with a Juris Doctorate degree, and Magna Cum Laude from Seton Hall University’s Stillman School of Business, where he earned a Bachelor of Science degree in Business Administration. While at Fordham, Mr. Hannan was honored to serve as Editor in Chief of the Fordham Sports Law Symposium, and to have been selected for internships with a preeminent Sports Agency and an Artist Management and Branding firm. He worked with a number of professional sports entities while at Seton Hall.

Having recently relocated back to his roots in Upstate New York, Mr. Hannan is excited at the prospect of serving the area in which he was raised, after years of service in the greater New York City area. He is licensed to practice law in the states of New York and New Jersey. He is a member of the New York State Bar Association, their Young Lawyers Section, and is an alumni of the New York Bar Association’s Trial Academy.


Photos and videos

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Practice areas


  1. Criminal Defense: 25%
  2. DUI & DWI: 25%
  3. Divorce & Separation: 20%
  4. State, Local And Municipal Law: 20%
  5. Contracts & Agreements: 10%



Contingent (25-33%), Fixed (sometimes), Retainer (sometimes), Free consultation (30 minutes), Pro bono (10%)

Payment types:

Cash, Check, Credit card

Attorney endorsements

3 total 

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  • Thomas Jay Olsen

    I endorse this lawyer.


    Thomas Olsen DUI & DWI Attorney
    Relationship: Other

  • Christian K. Lassen II

    I endorse this lawyer.


    Christian Lassen Personal Injury Attorney
    Relationship: Fellow lawyer in community

Contact info

Mark D. Hannan, Attorney at Law

510 Clinton Square
Rochester, NY, 14604


NYCurrently registered 201203/13/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Client's Choice AwardAvvo2013
Work experience
TitleCompany nameDuration
AttorneyMark D. Hannan, Attorney at LAw2014 - Present
Managing PartnerHANNAN & BLACK LAW GROUP, PLLC2012 - 2014
Association namePosition nameDuration
New York State Bar AssociationN/A2011 - Present
New York State Bar Association, Young Lawyers SectionN/AN/A
School nameMajorDegreeGraduated
Fordham University School of LawLawJD - Juris DoctorN/A
Speaking engagements
Conference nameTitleDate
Sports Law SymposiumSports Law2010