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About me

Marshall dedicates the majority of his practice to family law. He has handled all varieties of family law matters including divorce, child custody, paternity, child support, protective orders, post-divorce modifications and enforcements, termination/adoptions and interstate custody disputes. He has experience tackling the more contentious issues in family law, including disproportionate property divisions, spousal support, grandparents’ rights, interspousal tort actions, move-away cases, and cases involving substance abuse, child abuse and domestic violence.

Marshall also represents clients in federal income tax disputes with the IRS throughout the administrative appeals process and in proceedings before the United States Tax Court. He has a particular interest in the intersection of tax law and family law – including Injured Spouse and Innocent Spouse Relief and divorce planning to anticipate the tax implications of child support, alimony, property division and the transfer or sale of assets.


Photos and videos

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Practice areas


  1. Tax: 20%
  2. Family: 20%
  3. Child Custody: 20%
  4. Domestic Violence: 20%
  5. Divorce & Separation: 20%



Fixed (sometimes), Retainer (sometimes), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Ilana Rebecca Tanner

    I highly endorse this lawyer. Marshall is an excellent advocate and incredibly skilled in the courtroom. Marshall works very hard for his clients to get the best possible results.


    Ilana Tanner Divorce & Separation Attorney
    Relationship: Fellow lawyer in community

  • Rebecca Anne Mccarty Menduni

    Marshall is a great attorney to work with. He is very practical and reasonable.


    Rebecca Menduni Family Attorney
    Relationship: Opposing Counsel on matter

Contact info

Thompson Salinas Rickers & McDermott, LLP

8140 N. Mopac
Westpark 4, Ste. 250
Austin, TX, 78759


TXEligible To Practice In Texas 200810/19/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
MemberCollege of the State Bar of Texas2013
Honors GraduateThe University of Texas School of Law2008
MemberPhi Delta Phi Legal Honors Society2006
University HonorsThe University of Texas at Austin2002
Work experience
TitleCompany nameDuration
PartnerThompson Salinas Rickers & McDermott, LLP2013 - Present
AttorneyTexas Riogrande Legal Aid, Inc.2009 - 2013
AssociateMartens Seay and Todd2008 - 2009
Association namePosition nameDuration
Allandale Neighborhood AssociationVice President2014 - Present
Austin Bar AssociationMentor Attorney2014 - Present
Volunteer Legal Services of Central TexasMentor Attorney2013 - Present
United States District Court for the Western District of TexasMember2012 - Present
Williamson County Bar AssociationMember2012 - Present
United States District Court for the Southern District of TexasMember2010 - Present
United States Tax CourtMember2009 - Present
State Bar of TexasMember2008 - Present
Austin Young Lawyers AssociationMemberN/A
Austin Bar AssociationMemberN/A
Legal cases
Case nameOutcome
Morales v. Marquis, 2013 Tex. App. LEXIS 6455Successfully challenged post-answer default marriage annullment in restricted appeal. Appellate court reversed annulment and remanded for a trial on the merits.
See all legal cases 
Publication nameTitleDate
Central Texas LawyersWho Claims The Kids Once The Divorce Is Final: Divorce And The Child Dependency Exemption2013
Proceedings of the State Bar of Texas Poverty Law ConferenceAvoiding Tax Pitfalls in Your Family Law Practice2011
School nameMajorDegreeGraduated
University of Texas School of LawLawJD - Juris Doctor2008
University of Texas System, AustinGovernmentBA - Bachelor of Arts2005
Speaking engagements
Conference nameTitleDate
Austin Community College Paralegal Program; LGLA-1355 Family LawGuest Lecturer: Protective Orders and Domestic Violence2012
2012 TRLA Training Retreat and ConferenceSettlements: Income Tax Considerations2012
State Bar of Texas Poverty Law ConferenceAvoiding Tax Pitfalls in Your Family Law Practice2011