Tough.
Fair.
Unafraid to Do What’s Right.
As Associate District Judge, Sierra Pfeiffer will bring firmness and fairness to the bench — standing unmoved by politics, pressure, or connections.
For 13 years, Sierra has been on the front lines of Oklahoma’s criminal justice system — prosecuting violent offenders, drug traffickers, and major felony cases across multiple counties. She knows what it takes to keep communities safe, and she won’t hesitate to do what’s right.
Proven Criminal Law Experience
Tough, Fair, and Independent
Committed to Public Safety and the Rule of Law
Sierra Pfeiffer is a career prosecutor and attorney with 13 years of experience serving the people of Oklahoma. She has handled serious felony cases, prosecuted violent criminals, and worked closely with law enforcement to protect communities.
She currently serves as Deputy General Counsel for the Oklahoma State Bureau of Investigation and previously worked as an Assistant District Attorney in Logan County and surrounding jurisdictions.
Sierra believes in accountability, fairness, and applying the law exactly as written.
• Deputy General Counsel, Oklahoma State Bureau of Investigation
• Former Assistant District Attorney (Logan & surrounding counties)
• Former Counsel to the Commissioners of the Oklahoma Tax Commission
• Former Staff Attorney, Oklahoma Bureau of Narcotics
• Prosecuted violent felons, cartel members, and major drug operations
• J.D. with Honors, University of Oklahoma College of Law
Sierra grew up in a small town, graduated from a public high school as valedictorian, and earned admission to college on merit alone before returning to serve Oklahoma.
She lives in Mulhall with her husband, State Representative John Pfeiffer, and their son, Jack. They attend First United Methodist Church of Orlando, where Sierra helps with the Christmas program.
I’m running because I believe people deserve a judge who will follow the law, protect the community, and make decisions based on facts — not pressure, politics, or who you know.
As Associate District Judge, Sierra’s focus will be simple and clear: public safety, accountability, and fairness under the law.
Violent crime and repeat offenders put families at risk. Sierra will issue firm, consistent rulings that prioritize community safety.
Repeat offenders who violate probation should be dealt with swiftly. Sierra supports more efficient handling of revocation cases to prevent endless delays.
Judges are not lawmakers. Sierra believes in upholding the Constitution and applying Oklahoma law exactly as written — without activism or bias.
No special treatment. No inside connections. Every case deserves a fair hearing based on facts and law.