About

Mark Donaldson Lyons is a seasoned Tulsa attorney with more than 45 years of experience representing individuals and businesses across Oklahoma. Through Lyons & Clark, Inc. and the Law Offices of Mark Donaldson Lyons, he has developed a broad legal practice focused on business law, construction and development matters, and criminal defense. With decades of experience navigating complex legal issues, Mr. Lyons brings a practical, strategic approach to every matter he handles, helping clients understand their options and move forward with confidence. Throughout his career, Mr. Lyons has been known for providing thoughtful, results-oriented legal guidance tailored to each client’s goals. His business law practice supports entrepreneurs, companies, and professionals facing day-to-day legal concerns as well as more complicated disputes. In construction and development matters, he works with clients involved in the planning, execution, and resolution of issues that can arise in fast-moving projects. He also provides strong criminal defense representation, advocating for clients with professionalism, diligence, and a clear focus on protecting their rights. Based in Tulsa, Mr. Lyons is committed to delivering dependable legal counsel grounded in experience, responsiveness, and a deep understanding of the law. Clients turn to him for his steady judgment, accessible communication, and ability to address challenging legal matters with care and authority.

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