Brian D. Sieve

Brian D. Sieve

Chicago, IL recognized lawyers icon Recognized in Best Lawyers since 2013
Kirkland & Ellis LLP

214 Best Lawyers awards

Kirkland & Ellis LLP logo

Awarded Practice Areas

Commercial Litigation

Biography

Brian Sieve, a Fellow in the American College of Trial Lawyers, is an experienced trial lawyer. Praised for his ability to communicate with a jury and to present complex issues clearly and simply, he has tried more than thirty-five jury trials, bench trials, arbitrations, injunction proceedings, Markman hearings and evidentiary hearings. Brian was distinguished as one of The Best Lawyers in America, U.S. News and World Report, Best Lawyers® for 2013–2023 in the field of commercial litigation, and was named a "Leading Lawyer" in Illinois in 2004 for commercial litigation. He was named an "Illinois Super Lawyer" in intellectual property in 2005.

Brian has extensive experience representing manufacturing companies, financial services businesses, hedge funds, private equity companies and other entities. He has tried trade secret and non-compete cases, patent cases, trademark disputes, product liability matters, NASD/NYSE arbitrations, and general commercial matters. He has tried cases in state and federal courts across the country, including California, Illinois, Indiana, Michigan, Florida, New Jersey and New York. Among his notable trial results was a complete defense verdict for Osram Sylvania in a patent infringement matter that resulted in an award of more than $6.1 million in fees and costs to his client. Clients have praised Brian for bringing “intelligence, direction and energy to a previously chaotic situation while coordinating the efforts of many different parties.” He also has experience handling class actions, securities cases, and a variety of contractual disputes.

Brian devotes considerable time to teaching younger trial lawyers. He was the partner in charge of Kirkland's trial advocacy program (the Kirkland Institute for Trial Advocacy) for ten years, and he has taught trial advocacy at the University of Chicago Law School. He represents pro bono clients as a Panel Attorney for the Federal Defender Program in Chicago.

Kirkland & Ellis LLP

214 Best Lawyers awards

Kirkland & Ellis LLP logo

Overview

  • University of Chicago, J.D., graduated 1988
  • University of Chicago, J.D., graduated 1988

Client Testimonials

Brian Sieve is a top flight litigator who is as good as any in the country.

Gary Schmidt (Alberto Culver)

Brian Sieve is a great counsel, strong writer, and terrific negotiator.

James M. Sheehan (Tellabs, Inc.)

Brian Sieve is excellent in the courtroom. He is a great trial lawyer and an outstanding cross-examiner.

I have worked with or against the best trial lawyers in the business. Brian Sieve is every bit as good of a trial lawyer as any of them.

Awards & Focus

Recognized in The Best Lawyers in America® 2026 for work in:
  • Commercial Litigation
Additional Areas of Practice:
  • Litigation - Patent
  • Litigation - Securities

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