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Practice areas


  1. Lawsuits & Disputes: 20%
    21 years, 300 cases
  2. Intellectual Property: 20%
    18 years, 10 cases
  3. Investment Fraud: 20%
    21 years, 50 cases
  4. Class Action: 20%
    17 years, 10 cases
  5. Other: 20%
  6. More 

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Mark Allen White

    Dave is a very smart, aggressive and outstanding litigator, particularly with regard to securities fraud cases. I would not hesitate to refer any client to him.


    Mark White Litigation Attorney
    Relationship: Co-worker

Contact info

Siegmyer, Oshman & Bissinger LLP

2777 Allen Parkway
Tenth Floor
Houston, TX, 77019-2141


TXEligible To Practice In Texas 199407/16/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarTexas Monthly2007
Work experience
TitleCompany nameDuration
PartnerSiegmyer, Oshman & Bissinger LLP2006 - Present
Partner (2003-2006); Associate (2000-2002)Clements, O'Neill, Pierce, Wilson & Fulkerson, L.L.P./Wilson Fulkerson LLP2000 - 2006
Association namePosition nameDuration
Houston Bar Association - Securities Litigation and ArbitrationChairman2005 - 2007
Legal cases
Case nameOutcome
Daily v. Corporate Securities GroupAward for Claimant/Plaintiff
Icoworks Holdings, Inc. v. Network International, Inc., and De Bie Midland, Inc.Verdict for Defendant
See all legal cases 
Publication nameTitleDate
Texas Lawyer"The Smoking E-mail"2007
Texas Lawyer"Salvation by Summary"2007
School nameMajorDegreeGraduated
Vanderbilt University Law SchoolLawJD - Juris Doctor1993
University of IowaPhilosophyBA - Bachelor of Arts1990
Speaking engagements
Conference nameTitleDate
Annual Meeting"The Tech Wreck"2002