Mark McLennan is an intellectual property partner in the New York office of Kirkland & Ellis LLP. While he focuses his practice on patent litigation, Mark also has extensive experience counseling clients on patenting strategy, patenting evaluation, and IP due diligence. He has represented clients in a range of industries, including biotechnology, pharmaceutical and life sciences, as well as software, electronics, and consumer products.

Mark’s litigation experience extends from pre-suit strategy, all stages of discovery through to bench and jury trials, in addition to his experience in inter partes reviews, acting for both Patent Owners and Petitioners.

Mark has extensive international experience, completing a secondment in the London office of Kirkland & Ellis, and having previously practiced in Australia for a number of years.

Mark also maintains an active pro bono practice, including advocating for persons seeking asylum in the United States and arguing a disability benefits appeal.


Thought Leadership


"Patent and Technology Best Practices for 2017," Intellectual Property Institute Panel, Lavender Law Conference, San Francisco, CA, August 4, 2017


Selected as a New York "Rising Star" for Intellectual Property Litigation by Super Lawyers magazine, 2020–2021

Recipient, Kirkland & Ellis Pro Bono Service Award 2017–2020


Admissions & Qualifications

  • 2017, New York
  • 2013, High Court of Australia
  • 2012, Victoria, Australia (inactive)


  • United States District Court for the Southern District of New York
  • United States Court of Appeals for the Federal Circuit


  • Columbia Law SchoolLL.M.2016
    Harlan Fiske Stone Scholar
  • Monash UniversityLL.B.First Class Honors2012
  • Monash UniversityB.S., Pharmacology2012