Foss Lawyers

Chaille Walraven focuses her practice on oil and gas law and real estate matters, with an emphasis on litigation that protects the rights of land and royalty owners. Chaille has represented hundreds of land and mineral owners in both state and federal court, including the United States Court of Appeals for the Tenth Circuit. She devotes a large section of her practice to assisting royalty owners in enforcing the terms and conditions of their oil and gas leases. Since Chaille’s great-grandfather founded the family ranch over a century ago, four generations of her family have been land and mineral owners.

Chaille...

Anthony Moore is an attorney with the Christensen Law Group. He is an experienced trial lawyer with a primary focus on the representation of oil and gas mineral owners and landowners in the protection of their rights. He also represents clients through civil litigation, real estate transactions, title opinion, estate planning, and real property issues.

After graduating from Clinton High School in 2000, Anthony graduated from Oklahoma Christian University where he was a member of the Alpha Chi National Honor Society, National Dean's List and Chancellor's List. While at Oklahoma Christian, he was selected to participate in the prestigious...

Mark Walraven is a trial lawyer who primarily assists mineral owners with oil & gas negotiations, leasing, sales and litigation. Mark negotiates oil & gas leases and sales agreements to obtain the best possible terms for Oklahoma mineral owners. In the last three years alone, Mark and the G&W Oil & Gas Team has successfully negotiated over 1800 leases and mineral sales, obtaining over $120 million in lease bonuses and sales proceeds for Oklahoma mineral owners. Mark also assists clients in reviewing and negotiating lease assignments, division orders, royalty payment issues, and curing defects in title.

On the litigation side,...

Carissa (Marquis) King practices primarily the areas of estate planning, probate administration, trust administration, and real estate transactions. Originally from Weatherford, Carissa is a graduate of Southwestern Oklahoma State University (SWOSU), where she received a B.B.A. in Finance in 2008. She went on to attend the University of Oklahoma College of Law, where she was the recipient of a Top 20 Speaker award in the First Year Moot Court Competition and was named a Nathalie Pierrepont Comfort Scholar, a Thomas L. Hieronymus Memorial Fund scholar, an Oklahoma Bar Association Income Tax scholar, and was an Assistant Note Editor of the...

Roberto L. Seda is an experienced attorney concentrating in the areas of estate planning, probates, real property, oil and gas, curative transactional matters.

Roberto is the chairman of the Oklahoma Title Examination Standards, an active member of the Oklahoma City Association of Petroleum Landmen, and a volunteer attorney with Trinity Legal in Oklahoma City. He is licensed to practice in Oklahoma, Texas, New Mexico, North Dakota, as well as the United States Patent and Trademark Office.

Andrea Worden started the Worden Law Firm with a simple mission: To provide clients the level of service and representation she would want if she were the client. After 14 years, the mission remains the same. If you’re looking for an attorney who can get you the best possible result AND treat you with respect and dignity throughout the process, look no further.

With a combined 40 years of experience, we understand how important it is to ask the right questions, analyze every detail of every case, and explore all options on our clients’ behalf. Our team of dedicated attorneys...

I became a criminal defense attorney because I am intimately familiar with how precious our constitutional rights are. After my arrest years ago, I realized how close I was to being in a situation that could have negatively impacted my life forever. That made me realize how important it is to have someone on your side who feels strongly about protecting your rights. In the Air Force, I put my life on the line to support and defend the Constitution during combat. Today, I support and defend the Constitution in the courtroom. My legal career began by...

When Your Reputation and Finances Are at Stake, Invest in the Best! Investing in your defense: While our fees may be higher than some, consider it an investment. For professionals and businesses facing complex tax controversies or white-collar criminal charges, a misstep can be crippling. You need more than just an attorney; you need a fierce advocate, a seasoned strategist, and a proven winner. Why Choose Jeff Trevillion, Jr.? *Unmatched Expertise: With over 15 years of experience navigating the labyrinthine world of tax law and white-collar defense, Jeff Trevillion has a deep understanding of the challenges you face and a relentless pursuit of...