I have been engaged as an expert witness by the following firms ...

  • Kirkland & Ellis LLP
  • Quinn, Emanuel, Urquhart, & Sullivan, LLP
  • Williams & Connolly LLP
  • Boies Schiller & Flexner LLP 
  • Willkie Farr & Gallagher LLP
  • Susman Godfrey LLP
  • Irell & Manella LLP
  • Ballard Spahr LLP
  • USA Federal Trade Commission (Division of Advertising Practices)
  • In-house Counsel (Tucows) (Canada)
  • In-house Counsel (Yahoo!)
  • Pinsent Masons LLP (United Kingdom)
  • Mills & Reeve LLP (United Kingdom)
  • pro se litigant (Australia)
  • Arnold & Itkin LLP
  • Atlas Law PLLC
  • Beattie Padovano, LLC
  • BerlikLaw, LLC
  • Bracewell & Giuliani LLP
  • The Brandi Law Firm
  • Busch, Zurbuch & Thompson, PLLC
  • Choate, Hall & Stewart LLP 
  • Davis Wright Tremaine LLP
  • Denko Coburn Lauff LLP
  • DiNovo Price Ellwanger & Hardy LLP
  • Dykema Cox Smith
  • Gardere, Wynne & Sewell, LLP
  • Gibbs Law Group, LLC
  • Greene Broillet & Wheeler LLP
  • Hunton & Williams LLP
  • ​Jaffe, Weissing, Edwards, Fistos & Lehrman, P.L.
  • Kabateck, Brown, Kellner LLP
  • Kepner, Kepner & Corba, P.C.
  • Law Offices of James G. Schwartz P.C.
  • L. Lin Wood, P.C.
  • Michael Best & Friedrich, LLP
  • McKool Smith Hennigan, P.C.
  • Nix, Patterson, & Roach, LLP
  • Patterson Belknap Webb & Tyler LLP
  • Robbins, Geller, Rudman, & Dowd, LLP
  • Rymer, Moore, Jackson, & Echols PC
  • Searcy Denney Scarola Barnhart and Shipley, P.A.
  • Seeger Weiss LLP
  • Watts & Guerra LLP
  • Young Basile Hanlon & MacFarlene P.C. ​

​​​                                                                                                  Bernard J. Jansen, Jim Jansen, Jansen Expert Witnessing (current as of 2021)
Subject matter expertise
Subject matter expertise in ad replacement expert witness, affiliate advertising expert witness, benefits of search engines expert witness, content advertising expert witness, cookie stuffing expert witness, co-registration advertising expert witness, cross screens expert witness, demographic targeting expert witness, domain parking expert witness​, dual screens expert witness, how people search expert witness, how people view search results expert witness, how search engines work expert witness, information retrieval expert witness, image searching expert witness, keyword advertising expert witness, online advertising expert witness, online branding expert witness, online copyright expert witness, online defamation expert witness, online marketing expert witness, online reviews expert witness, online trademarks expert witness, online trademark infringement expert witness, pay-per-click expert witness, PPC expert witness, online reputation management expert witness, search engine optimization expert witness, SEO expert witness, search engine marketing expert witness, second screens expert witness, SEM expert witness, search engines expert witness, social media expert witness, social media defamation expert witness, tracking code replacement expert witness, trademark issues in online advertising expert witness, trademark issues in web searching expert witness, web analytics expert witness, web page archiving expert witness, web page viewing expert witness, web search expert witness, webpage ranking  expert witness​​