About John P.
John P. Kelsh's path to the law began in liberal arts classrooms and moved steadily toward the nation's highest bench. He earned a B.A. from Williams College in 1989, then a master's degree from the University of Hawaii at Manoa in 1993. He completed his legal studies at Northwestern University School of Law, receiving his J.D. in 1996.
Clerkships followed immediately. After law school he clerked for Judge David B. Sentelle on the U.S. Court of Appeals for the D.C. Circuit in 1996. The next year he served as a law clerk to Chief Justice William H. Rehnquist at the United States Supreme Court. Those two years gave him close exposure to appellate decisionmaking and the mechanics of federal judicial work.
Kelsh entered private practice at Sidley Austin LLP as an associate in 1998. He rose through the firm and became a partner in 2004. His tenure there spans decades and includes work on matters that required navigating federal courts and regulatory frameworks. He has balanced brief writing and client counseling, and he has spent time preparing arguments and filings intended for appellate review.
His early appellate experience shapes how he approaches legal problems. Having observed judges and the internal rhythms of high-level courts, he brings a judicially informed perspective to the drafting of motions and the presentation of complex legal questions. That perspective is reflected in day-to-day work that involves research, drafting, and strategizing for litigation and dispute resolution.
He was admitted to the Illinois bar in 1996 and is a current member of the Illinois State Bar. His long-term association with Sidley Austin places him among lawyers who practice across a range of federal and state matters. Colleagues describe him as methodical and precise in handling legal documents and court filings.
In recent years his practice has remained anchored at Sidley Austin LLP in Illinois, where he continues to represent clients in matters that draw on his appellate and federal court experience. He now focuses on advising clients and handling litigation tasks that reflect his years of service at the appellate and Supreme Court levels.
