Timothy M. Tymkovich

Timothy M. Tymkovich is an American jurist who has served on the United States Court of Appeals for the Tenth Circuit since 2003 and held the position of chief judge from 2015 to 2022. Appointed by President George W. Bush, he has participated in a broad range of appellate decisions involving constitutional rights, federal statutes, and state sovereign immunity. In addition to his circuit service, he was designated in 2023 by Chief Justice John Roberts to sit on the United States Foreign Intelligence Surveillance Court of Review. His career reflects extensive experience in both private practice and public service, including a tenure as Colorado’s solicitor general.

Early life and legal career

Timothy Michael Tymkovich was born in Denver, Colorado, in 1956, making him a third‑generation Coloradan. His family background includes an immigrant great‑grandfather who arrived from Ukraine through Ellis Island and worked as a miner, underscoring deep regional roots. He pursued undergraduate studies at Colorado College, receiving a Bachelor of Arts degree in 1979. Continuing his education in the state, he attended the University of Colorado Law School, where he contributed to the university’s law review and earned a Juris Doctor in 1982.

Following graduation, Tymkovich clerked for Chief Justice William Erickson of the Colorado Supreme Court from 1982 until 1983, gaining early exposure to appellate jurisprudence. He then entered private practice, dividing his time between Denver and Washington, D.C., from 1983 through 1991. In 1991, Colorado Attorney General Gale Norton appointed him as the state’s solicitor general. During his five‑year tenure in that role, Tymkovich represented Colorado before the United States Supreme Court on several occasions. Notably, he argued the case of *Romer v. Evans* (1996), contending that Colorado’s Amendment 2— which eliminated local protections for LGBT individuals— did not violate the Fourteenth Amendment’s Equal Protection Clause; the Supreme Court ultimately rejected that position.

After completing his service as solicitor general in 1996, Tymkovich returned to private practice in Denver, where he continued to engage in complex litigation and appellate work. This blend of governmental advocacy and private sector experience laid the groundwork for his later judicial career on the federal bench.

Federal appellate service

President George W. Bush first nominated Tymkovich to a vacancy on the Tenth Circuit on May 25, 2001. The seat had become open when Judge John Carbone Porfilio assumed senior status. Because the Senate did not act on that nomination, Bush renominated Tymkovich on January 7, 2003. The nomination followed an earlier attempt by President Bill Clinton to fill the same vacancy with Christine Arguello, a nomination that never proceeded to a hearing or vote.

The United States Senate confirmed Tymkovich on April 1, 2003, by a vote of 58‑41, and he received his commission later that day. From that point forward, he has served as an active circuit judge, participating in the full complement of appellate duties for the Tenth Circuit, which covers six western states.

In October 2015, Tymkovich succeeded Judge Deanell Reece Tacha as chief judge of the Tenth Circuit, a role he fulfilled until October 2022. As chief judge, he oversaw administrative functions of the court and represented the circuit in interactions with other branches of government.

During his tenure on the bench, Tymkovich attracted attention beyond the appellate docket. In September 2016, then‑presidential candidate Donald Trump listed him among potential nominees for the United States Supreme Court, reflecting his prominence within conservative legal circles. Two years later, in 2018, he was tasked with reviewing a series of ethics complaints filed against Justice Brett Kavanaugh of the Supreme Court, illustrating the trust placed in his judgment on matters of judicial conduct.

On November 1, 2023, Chief Justice John Roberts designated Tymkovich as a judge of the United States Foreign Intelligence Surveillance Court of Review, an appellate body that reviews decisions from the Foreign Intelligence Surveillance Court. This appointment expanded his responsibilities into national security oversight.

Most recently, on February 24, 2026, Tymkovich announced his intention to assume senior status, signaling a forthcoming transition while allowing him to continue hearing cases on a reduced basis.

Jurisprudence and legacy

Judge Tymkovich’s written opinions have addressed a variety of substantive legal issues, contributing to the development of federal appellate jurisprudence in areas such as firearms regulation, sovereign immunity, free speech, religious liberty, and special education law.

In *United States v. McCane* (2009), the Tenth Circuit affirmed a conviction for felon‑in‑possession of a firearm. While joining the majority, Tymkovich authored a concurring opinion expressing concern that the Supreme Court’s language in *District of Columbia v. Heller*— which suggested that longstanding prohibitions on felons possessing firearms should not be questioned— might limit lower courts’ ability to conduct thorough constitutional analysis.

His decision in *Guttman v. Khalsa* (2012) dealt with a professional‑licensing dispute involving the New Mexico Board of Medical Examiners. Writing for the majority, Tymkovich held that the Eleventh Amendment barred suits against a state concerning its licensing decisions, reinforcing principles of state sovereign immunity.

In *United States v. Strandlof* (2012), he addressed the constitutionality of the Stolen Valor Act, which criminalized false claims about military honors. The opinion concluded that knowingly false statements of fact are not protected by the First Amendment, aligning with a view later examined by the Supreme Court in *United States v. Alvarez*. Although the Supreme Court ultimately struck down the statute on different grounds, Tymkovich’s reasoning contributed to the ongoing dialogue about the limits of free speech.

Perhaps his most widely cited opinion concerns corporate religious liberty. In *Hobby Lobby Stores v. Sebelius* (2013), an en banc panel of the Tenth Circuit held that closely‑held for‑profit corporations could assert religious freedom claims under the Religious Freedom Restoration Act. Tymkovich authored the majority opinion, which was later affirmed by the Supreme Court in *Burwell v. Hobby Lobby Stores, Inc.* This decision has had a lasting impact on the interpretation of religious rights for business entities.

In the realm of special education, Tymkovich wrote the opinion for the Tenth Circuit in *Endrew F. v. Douglas County School District* (2015). The court concluded that the student with autism had received an appropriate public education because he obtained “some educational benefit,” a standard derived from earlier Supreme Court precedent. The United States Supreme Court later reversed this analysis, emphasizing a higher level of educational benefit required under the Individuals with Disabilities Education Act. While the reversal altered the legal landscape, Tymkovich’s opinion illustrates his engagement with complex statutory interpretation and the balance between federal mandates and local school district discretion.

Across these cases, Judge Tymkovich has demonstrated a methodical approach to statutory construction and constitutional analysis, often emphasizing textual fidelity and historical context. His rulings have been cited in subsequent appellate decisions and have shaped discourse on issues ranging from gun rights to religious freedom for corporations. Moreover, his participation in high‑profile administrative roles— including chief judge duties and service on the Foreign Intelligence Surveillance Court of Review— underscores a career marked by both judicial decision‑making and institutional leadership.

Collectively, Timothy M. Tymkovich’s professional trajectory—from Colorado solicitor general to senior appellate jurist—reflects a sustained involvement in the development of United States law. His opinions continue to influence legal practitioners, scholars, and courts within the Tenth Circuit and beyond, cementing his legacy as a significant figure in contemporary federal jurisprudence.