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Michael M Giel

About me

I practice family law and family law appeals exclusively. But my experience in high-stakes business litigation and appeals helps me represent you when you’re facing the most important and emotionally charged challenges in your life: those affecting you and your children.


My experience before joining J. Demere Mason, P.A. includes handling complex commercial litigation and appeals with the Jacksonville office of an international law firm and a Jacksonville business litigation firm. I've represented some of America’s largest financial institutions and businesses. I draw on this background to help clients grappling with the complex financial issues that can arise in a divorce, support, or modification proceeding, such as the valuation and distribution of properties, businesses, retirement funds, and other assets. I've remained dedicated to effective appellate advocacy throughout his legal career.


After graduating from the University of Chicago Law School, I clerked for Judge Emerson R. Thompson, Jr. of Florida’s Fifth District Court of Appeal. There, by analyzing hundreds of briefs and assisting the court with the legal research and writing required to resolve appeals, I gained invaluable perspective on how judges evaluate and decide cases. I rely on that experience when crafting arguments designed to convince the appellate court to rule in favor of my clients. I've prepared and filed briefs in most of Florida’s district courts of appeal, the Florida Supreme Court, the Eleventh Circuit Court of Appeals, and the United States Supreme Court.


This appellate practice shapes my approach to litigating family law cases at the trial level. The required familiarity with current legal trends helps clarify the central factual and legal issues in each family law trial. Focusing on the critical points of your case serves the goal of pursuing an efficient, cost-effective resolution. I handle family law appeals anywhere in Florida.


Yet I gained the most valuable experience before I even finished college. I was a machinegunner in the United States Marine Corps and finished active duty as a Sergeant. As a lawyer, I bring to bear the same dedication and tenacity fostered in the Marine Corps. And, having served as a team leader and squad leader, I especially appreciate the challenges facing servicemembers and their families.


To learn more about me, my background, and why I love practicing family law, please feel free to read my interview with Andrew Pentis at this link:



Practice areas


  1. Appeals: 28%
  2. Child Support: 18%
  3. Family: 18%
  4. Divorce & Separation: 18%
  5. Child Custody: 18%


Payment types:

Cash, Check, Credit card

Attorney endorsements

6 total 

Are you an attorney? Endorse this lawyer

  • G. Glenn Warren III

    I endorse this lawyer. I have known Michael for several years. I have found him to be very dedicated to his clients. You can count on Michael to identify all of the necessary issues in your case and represent you accordingly. I am also honored to call Michael a personal friend. If you are looking for a family law attorney, I recommend you give Michael a call.


    G. Warren Car Accidents Attorney
    Relationship: Fellow lawyer in community

  • Alyson Marie George

    Michael is an excellent advocate for his clients. I had the pleasure of working on a personal injury matter with him as co-counsel. As we prepared the matter for trial, we worked together on a Daubert hearing. His writing skills are impeccable and his advocacy in the courtroom was outstanding. We obtained a favorable ruling in the Daubert hearing. We also obtained a favorable ruling on our motion for the jury to view the scene of the accident. As a result of these victories, we had a very good outcome for the client before the trial. I highly recommend Michael for his research, writing, and oral advocacy skills.


    Alyson George Personal Injury Attorney
    Relationship: Worked together on matter

Contact info

J. Demere Mason, P.A.

8130 Baymeadows Way West, Suite 304
Jacksonville, FL, 32256


FLMember in Good Standing200509/08/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising Star (Appellate)Florida Super Lawyers2015
Rising Star (Appellate)Florida Super Lawyers2014
Rising Star (Business Litigation)Florida Super Lawyers2012
Rising Star (Business Litigation)Florida Super Lawyers2011
Rising Star (Business Litigation)Florida Super Lawyers2010
Work experience
TitleCompany nameDuration
AttorneyJ. Demere Mason, P.A.2015 - Present
AttorneySwope, Rodante, PA2014 - 2015
AttorneyBajalia Sanders, P.A.2013 - 2014
Vice President, Litigation CounselEverBank2012 - 2013
AssociateVolpe, Bajalia, Wickes, Rogerson & Wachs2009 - 2012
AssociateMcGuireWoods LLP2007 - 2009
Law ClerkFlorida Fifth District Court of Appeal2005 - 2007
Association namePosition nameDuration
Catholic Charities of JacksonvilleVolunteer2015 - Present
Gator Bowl CommitteePresident's Circle Member2012 - 2013
American Bar Association, Section of LitigationCo-Chair, Young Lawyers Subcommittee, Appellate Committee2011 - 2012
Florida Bar FoundationFellow2010 - Present
American Bar Association, Section of LitigationMember, Bar Liaison Subcommittee, Appellate Committee2010 - 2010
American Bar Association, Section of LitigationCo-Chair, Young Lawyers Subcommittee, Appellate Committee2008 - 2009
Impact Jax, Professional Development CommitteeMember2008 - 2009
Gator Bowl CommitteeMember, Class of 20082008 - 2014
American Bar Association, Section of LitigationEditorial Bd. Member, Commercial/Business Litigation Newsletter2008 - 2009
Florida BarEditorial Bd. Member, Florida Bar News/Florida Bar Journal2008 - 2011
University of Chicago Law School Alumni Admissions CommitteeMember2007 - Present
University of South Florida Alumni Association, Jacksonville ChapterLeadership Team Member2007 - 2010
University of South Florida Alumni Association, ACT CommitteeMember2007 - 2009
Florida Bar, Business Law SectionMember2007 - 2013
American Bar Association, TTIP SectionAssistant Editor, Appellate Advocacy Committee Newsletter2006 - 2007
Florida Bar, Appellate Practice SectionMember2006 - Present
Chicago Journal of International LawStaff Member2004 - 2005
Publication nameTitleDate
AAJ Insurance Law Section NewsletterWurtz v. Rawlings Co.: The Second Circuit Resurrects a Class Action Against Insurers Raiding Plaintiffs’ Tort Settlements In Defiance of New York’s Anti-Subrogation Law2014
The LawyerProtecting the Ruling on Your Motion in Limine2014
Conflict ManagementKey Considerations for Litigating Class Action Waivers within Arbitration Agreements2009
Conflict ManagementKey Considerations for Litigating Class Action Waivers Within Arbitration Agreements, Part II2009
Florida Civil Trial Certification Review Course, February 2008Co-author, Course Outline for Recent Developments in Commercial Litigation2008
ABA Business Torts JournalAccounting for Accountants' Breaches of Fiduciary Duty in Motions to Dismiss or for Summary Judgment2007
ABA Commercial and Business Litigation NewsletterLitigating Lost Profits for New Businesses2007
ABA Admiralty and Maritime Law Committee Newsletter"Practically Capable of Maritime Transport": Semantics and the Definition of "Vessel" after Stewart v. Dutra Construction Co.2007
The Record: The Journal of Florida's Appellate Practice SectionCo-author, Fifteen Common Mistakes in Appellate Briefs2007
Florida Bar JournalAvoiding Fundamentally Erroneous Jury Instructions: Pointers for Counsel in Criminal Trials and Appeals2007
ABA Appellate Practice JournalYoung Lawyers Focus: Making the Most of Your Appellate Clerkship2007
The Record: The Journal of Florida's Appellate Practice SectionApprendi in Florida: Jury Findings on Sentencing Factors and Elements, Retroactivity, and Harmless Error in Non-Death Penalty Cases2006
School nameMajorDegreeGraduated
University of Chicago Law SchoolLawJD - Juris Doctor2005
University of South FloridaEnglish LiteratureBA - Bachelor of Arts2002
Speaking engagements
Conference nameTitleDate
Practice Before the Fifth District Court of Appeal CLEModerator, Professionalism Presentation and Panel Discussion2010
Continuing Legal Education PresentationAvoiding Fundamentally Erroneous Jury Instructions2008