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About me

John Tomaszewski is Senior Counsel with Seyfarth Shaw's International Data Protection Practice Group. He has significant experience counseling companies regarding data protection and information security throughout the Americas, Europe and Asia. His clients have included a myriad of technology companies as well as financial services, pharmaceuticals, and e-commerce companies of all sizes. John has prepared privacy policy documentation for HR departments, cloud service providers, social media companies, and a host of both traditional “brick-and-mortar” and emerging technology clients. He has also developed fair information practice statements, certification practice statements, PKI policies, non-disclosure agreements, and similar information security and confidentiality instruments.

John has been a co-author of several information security and privacy publications, including the PKI Accreditation Guidelines and Privacy, Security and Information Management: An Overview, as well as publishing scholarly works of his own on the topic. He has also provided input to the drafting of various security and privacy laws around the world; including the new APEC Cross-Border Privacy Rules system, which was included in the White House’s Privacy Bill of Rights initiative in 2012. He is a frequent speaker globally on the topics of cloud computing, Self Regulatory Organizations (“SROs”), cross-border privacy schemes, and secure e-commerce. 

Specialties: Privacy Law, Self Regulatory Organizations, International Public Policy, Information Security, Digital Signatures, eCommerce Law, Corporate Governance, Contract Law, Legislative Review


Practice areas


  1. Privacy: 65%
    14 years
  2. International Law: 15%
    11 years
  3. Contracts & Agreements: 10%
    17 years
  4. Business: 5%
    17 years
  5. Banking: 5%
    7 years

Attorney endorsements

1 total 

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  • Warren E Agin

    I've known John for many years, both through my work with the American Bar Association where he has continuously contributed to the development of privacy law at its cutting edge, and as a result of my work writing about privacy and insolvency issues for Thomson West, where John has proved an invaluable resource for ideas and information. His experience as former general counsel for TRUSTe means that he is more than just another lawyer practicing in the privacy field; he has unique insights and knowledge impossible to find elsewhere.


    Warren Agin Chapter 7 Bankruptcy Attorney
    Relationship: Fellow lawyer in community

Contact info

Seyfarth Shaw

700 Milam, Suite 1400
Seyfarth Shaw
Houston, TX, 77002


FLMember in Good Standing199909/08/2015
TXEligible To Practice In Texas 199810/19/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
Senior CounselSeyfarth Shaw2013 - Present
General CounselTRUSTe2006 - 2013
Chief Privacy OfficerCheckFree2001 - 2006
PKI ConsultantBaltimore Technologies2000 - 2001
AttorneyDraughon Professional Association1998 - 1999
Association namePosition nameDuration
American Bar AssociationChair, ePrivacy Committee2011 - 2012
Publication nameTitleDate
American Bar Association publicationPrivacy, Security and Information Management: An Overview2011
IEEE Privacy & SecurityAre You Sure You Had a Privacy Incident2006
State Bar of Georgia, Technology Law Section NewsletterState of Connecticut v. Swinton: A Discussion of the Basics of Digital Evidence Admissibility2005
Gonzaga Law ReviewThe Pandora’s Box of Cyberspace: State Regulation of Digital Signatures and the Dormant Commerce Clause1997
Journal of Technology Law & Policy (University of Florida)The Enforceability of Adhesive Arbitration Clauses in International Software Licenses1997
School nameMajorDegreeGraduated
St Mary's University of San Antonio School of LawLawJD - Juris Doctor1998
University of TexasEnglishBA - Bachelor of Arts1992
Speaking engagements
Conference nameTitleDate
10th Annual Privacy & Data Security Law InstituteSocial Networking, Blogging and Behavioral Targeting2009
Internet Strategy Forum, Executive SummitInternet Strategy & the Law – A Landscape2008
30th Annual Regulatory Compliance ConferenceHot Topics in Privacy for 20082008