About
Mike O’Brien is a criminal defense lawyer at O’Brien Law Firm, PLLC, with extensive experience representing individuals charged with DUI and related offenses in Oklahoma. He built his career through years of hands-on work in the legal system, giving him a strong understanding of how cases are investigated and prosecuted. His background allows him to analyze evidence carefully and develop effective defense strategies. Clients rely on his practical approach, clear communication, and steady focus on protecting their rights throughout every stage of the legal process.
Mike earned his J.D. from Oklahoma City University School of Law in 1990, establishing the foundation for his legal career. Before becoming a practicing attorney, he gained valuable experience as an accident reconstruction specialist with the Oklahoma City Police Department. This technical background strengthened his ability to understand complex case details and evidence. His combined education and early professional roles continue to support his approach to defending clients in DUI and criminal cases with accuracy and insight today consistently.
Mike, following his education, served as a Hearing Officer for the Department of Public Safety for eight years. In this role, he reviewed cases and made decisions that required fairness, attention to detail, and legal knowledge. This experience gave him insight into administrative procedures and how legal decisions are evaluated. He uses this understanding to guide clients through complex situations, ensuring they are informed and prepared when facing charges or legal challenges in their cases every day.
Mike O’Brien has focused on defending DUI cases and helping clients navigate serious charges that can affect their future for more than 25 years. He works to reduce penalties, challenge evidence, and protect his clients from long-term consequences. His commitment to thorough preparation and client-focused service has earned trust from those he represents. By combining legal knowledge with practical experience, he provides dependable guidance and works toward the best possible outcomes for every client he serves today.
Law Office Affiliations
- Owner, O’Brien Law Firm, PLLC
- Member, Oklahoma Bar Association
Licensed State
- Oklahoma
Education
- Oklahoma City University School of Law
Juris Doctor (JD)
Awards & Badges
- Drug Crime
- DUI & DWI





