Bison Law Firm
Vigorously Fighting For You
The attorneys at Bison Law Firm have over 100 years of combined experience fighting for Oklahoma families.
How Are We Different?
At Bison Law Firm, we understand that a personal injury is more than a legal case — it is a life-changing event. That is why we approach every client relationship with genuine empathy and a commitment to understanding the full impact of their injuries on their lives and families.
Communication is the foundation of everything we do. We believe you should never have to wonder about the status of your case. Our team provides regular updates, answers your questions promptly, and makes sure you understand every step of the legal process.
We are proud to be part of the Oklahoma City community. Our attorneys live and work here. We see our clients at the grocery store, at local events, and in our neighborhoods. That personal connection drives us to fight harder and deliver better results for the people we serve.
With more than 100 years of experience, we have the knowledge and resources to take on the largest insurance companies and corporations. But we have never lost sight of what matters most: the people we represent and the justice they deserve.
Our Attorneys
Dedicated advocates with decades of experience fighting for the rights of injury victims across Oklahoma.
John Alberts
Managing Attorney
John is the founder of Bison Law Firm and Bedlam Law in Yukon, Oklahoma, with more than thirty-five years of legal experience. His practice focuses on helping injured Oklahomans in cases involving truck and car wrecks, oil field injuries, wrongful death, personal injury, elder abuse, and nursing home neglect. After beginning his career as an Assistant District Attorney in Kay County, John spent decades in private practice in Oklahoma City before returning to his hometown of Yukon to open Bedlam Law in 2018, followed by Bison Law Firm in 2019.
A graduate of Oklahoma State University and Oklahoma City University School of Law, John has been recognized as a Martindale-Hubbell AV Rated Lawyer since 2008. He is a member of the Oklahoma Bar Association, American Bar Association, and Canadian County Bar Association.
Beyond his legal practice, John has dedicated more than thirty years to public service in Yukon, including service on the City Council and six terms as Mayor. He continues to serve his community through board roles with Integris Canadian Valley, the Yukon Community Support Foundation, and the Yukon Cemetery Association, guided by his belief that the goal of a life well lived is “to leave this world better than I found it.”
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Kirk Olson
Attorney
Kirk Olson has over 30 years of legal experience representing injured plaintiffs in cases involving catastrophic personal injury, wrongful death, sexual abuse and misconduct, nursing home and Alzheimer’s-related abuse, semi-tractor trailer collisions, and insurance disputes. Inspired by his father’s career as an FBI Agent, he has built his practice on a deep commitment to protecting the rights of others, regardless of their circumstances.
Kirk earned his Bachelor of Science in political science from Oklahoma State University and his Juris Doctorate from the University of Oklahoma, where he served as research editor of the Oklahoma Law Review. He is admitted to practice before the United States Supreme Court, the Tenth Circuit Court of Appeals, and all three federal district courts in Oklahoma, and he handles cases throughout the state.
His work has been recognized with Martindale-Hubbell’s “AV” rating, the Oklahoma County Bar Association’s Leadership in Law Award, and the McDaniel Man of the Year award from the Alzheimer’s Association, where he served for over a decade, including a term on the Board of Directors.
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Mark Van Paasschen
Attorney
Mark Van Paasschen is a personal injury attorney at Bison Law Firm, representing injured Oklahomans in cases involving auto and trucking collisions, products liability, medical malpractice, insurance bad faith, catastrophic injury, and wrongful death. He handles all cases on a contingency-fee basis and is licensed in both Oklahoma and Texas state and federal courts. His appellate work includes Wiley v. Gray Television (Oklahoma Court of Civil Appeals, 2023).
Before practicing law, Mark spent a decade as a television journalist and sports broadcaster, including roles as Sports Director at KSBI-TV 52 in Oklahoma City, where he anchored the nightly show OK SportsWrap. He earned his Bachelor of Journalism from The University of Texas at Austin and his Juris Doctor from Oklahoma City University School of Law in 2013. That storytelling background shapes how he approaches every case — translating complex facts into clear, compelling narratives that adjusters, judges, and juries can’t ignore.
Mark is a member of the Robert J. Turner Inn of Court and Crossings Community Church. When he isn’t in the courtroom, he can often still be found behind a microphone — as the stadium public address announcer for Mustang High School athletics and on game nights for the Oklahoma City Thunder and Oklahoma City Baseball Club.
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Nathan D. Richter
Attorney
Nathan Richter is an Oklahoma trial lawyer with more than sixteen years of experience fighting for people who have been hurt by the negligence of others. His personal injury practice covers motor vehicle and trucking collisions, dangerous and defective products, premises liability, wrongful death, and insurance bad faith claims. Nathan has tried cases to verdict in both state and federal court and holds a published opinion before the Oklahoma Supreme Court — Fisch v. Stuart, 2014 OK 59, 362 P.3d 648.
Before practicing law, Nathan earned a Bachelor of Science in Zoology with an emphasis in Genetics from the University of Oklahoma, contributing to the Human Genome Project as a research assistant supervisor. He served as a Captain in the Oklahoma Army National Guard, deploying to Afghanistan in support of Operation Enduring Freedom and to New Orleans following Hurricane Katrina. He earned his Juris Doctorate, cum laude, from Oklahoma City University School of Law in 2007.
A two-time Super Lawyers Rising Star and recipient of the Oklahoma Bar Association’s 2019 Outstanding Young Lawyer Award, Nathan has held leadership roles including Chair of the OBA Young Lawyers Division and President of the Canadian County Bar Association. He volunteers extensively with Trinity Legal Clinic, Lawyers for Heroes, and Youth & Family Services of El Reno, bringing the same dedication to community service that has defined his career.
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Kevin Cunningham
Attorney
Kevin Cunningham is a general civil litigation attorney whose practice includes personal injury, wrongful death, insurance disputes, contract disputes, and business development services. Born in El Reno and raised in Yukon, he has built his career on the belief that the courtroom should be a place where every person stands on equal footing, regardless of background or resources.
He earned his undergraduate business degree from the University of Oklahoma and his Juris Doctorate from Oklahoma City University School of Law in 2008. Mr. Cunningham is admitted to practice before the Oklahoma Bar, all federal district courts in Oklahoma, and the Tenth Circuit Court of Appeals.
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The dedicated professionals who keep our firm running and our clients supported every step of the way.
Stephanie Davis
Operations
Karen K. D. Brady
Paralegal
Shaylee Narvaiz
Legal Assistant
Chelsea Fortney
Client Support Specialist
Jewel Stephans
Case Management Support
Chief Comfort Officers
Tiffany and Crash don’t bill hours, but they handle client greetings, stress relief, and office morale with unmatched dedication.
Crash
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Tiffany
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Let Us Fight for You
Schedule a free consultation with our experienced attorneys today.