As co-owner and founder of Cook Williamson Law Group, Tamara has three decades of legal experience. Over the course of her career, Tamara’s robust law practice has primarily focused on issues facing clients in the areas of commercial trucking and transportation. She has advised owners and managers on complex business transactions, from litigating liability claims for the trucking industry to managing employee whistle-blower complaints, and has skillfully counseled many of the nation’s largest transportation clients in areas such as risk management, operational safety, and audit support/consultation.

Tamara works tirelessly on behalf of clients, ensuring her legal representation is complementary to the overall objectives of the client’s interests. She bases her representation on a foundation of mutual trust and respect, and her clients appreciate the personal nature of her practice, as well as her willingness to understand their business’ operations as a whole. This dedication has served her well, building her experience in the transportation industry and making her a frequent presenter at transportation conferences across the nation.

Tamara’s dedication doesn’t stop there. She also serves as Arizona’s Vice-Chair of the Commercial Transportation Litigation Committee for the American Bar Association. For years, she has held a leadership role in the Trucking Industry Defense Association (TIDA). Additionally, Tamara has chaired/vice-chaired numerous trucking/transportation industry programs.

Graduating from Western State College of Law in 1982, Jack became an active member of the litigation community with unparalleled focus and drive. He has always been quick to do what needs to be done, successfully trying his first Superior Court jury trial within six months of passing the California Bar Examination. Starting as he meant to go on, Jack argued the case on behalf of a trucking company and its driver in a precedent that would set the tone for his career.

Jack’s bountiful experience is seen in his various positions and accomplishments in both academic and judicial contexts. Participating within the judicial system, he has acted as a Judge Pro Tem in the Orange County Superior Court and both an Arbitrator and Mediator for the Los Angeles Superior Court. He has also lectured for professional organizations on subjects ranging from traumatic brain injuries to construction law, and taught legal writing in law school.

Jack has earned a “Preeminent Attorney” rating by Martindale Hubble through his peers within the legal community. He has received unsurpassed evaluations in both his legal skills and ethical advocacy, and continued successful trial results throughout his career have earned him membership in the American Board of Trial Advocacy (“ABOTA”). In addition, Jack devotes a portion of his practice providing pro bono legal services to deserving people in need of legal services.

Arizona license: 

Madison is a paralegal with Cook Williamson Law Group.  She has worked for the firm since 2020.  Madison is a graduate of Arizona State University, where she earned a degree in Interdisciplinary Studies with concentrations in Global Health and Criminal Justice and Criminology.  Madison is a seasoned paralegal who is responsible for all aspects of our litigation practice.  Madison’s experience leads our matters from inception to resolution. 

In her spare time, Madison loves exploring the best new restaurants, breaking a sweat at workout events, and jetting off on spontaneous adventures. 

Nancy is a contract paralegal with Cook Williamson Law Group.  She has worked for the firm since 2025.  Nancy is a Certified eDiscovery Specialist who brings a wealth of experience and knowledge to the company.  As a 30-year paralegal, she assists the firm in all facets of litigation.  Her contributions assist the firm in maintaining the highest standards of professionalism and ethics.

In her spare time, Nancy finds joy in the simple pleasures of life— weekends often take her to the beaches of San Diego, to unwind and recharge by the ocean. She is an avid dog lover, and her German Shorthaired Pointer and Labrador Retriever are constant companions—whether exploring trails, playing fetch, or simply relaxing at home. She has a creative eye for home staging, turning spaces into inviting havens, and cherishes quality time spent with family.