Attorney Profiles

Mark A. Robertson

Mark Robertson is a Partner in the offices of Robertson & Williams. Mr. Robertson represents businesses and the families that own them. His practice focuses primarily in the areas of corporate law, mergers, acquisitions, trusts and estates. Other areas of practice are securities, franchising, corporate financing, and nonprofit and charitable organizations.

Mr. Robertson received his undergraduate degree from Depauw University and his J.D. from the University of Oklahoma College of Law. He also studied at the University of Edinburgh where he studied international law, Scottish culture, and scotch whiskey. Mr. Robertson is a member of the Oklahoma Bar Association and is an active member in the American Bar Association where he serves on the Editorial Board and the Publishing Board for the Law Practice Management Section and is the former Chair of that Section. He is also currently serving as a the representative in the House of Delegates of the American Bar Association for the Law Practice Management Section. He is also a trustee of the College of Law Practice Management.

Mark is very active in the Oklahoma City community serving on various boards such as the Oklahoma Creativity Project, the Lyric Theater and the Kirkpatrick Foundation. In 2008, Mr. Robertson co-authored the book Winning Alternatives to the Billable Hour: Strategies that Work, 3rd Editionwith James A. Calloway. He is married to Susan Robertson and they have two children.

Thomas C. Williams

Thomas C. Williams is a Partner in the offices of Robertson & Williams. Mr. Williams focuses his practice primarily in all areas of oil and gas law. Additional practice areas include probate, as well as civil litigation.

Mr. Williams attended the University of Oklahoma, University of the Americas, Mexico and Oklahoma City University where he received his B.S. degree. He also received his J.D. from the Oklahoma City University. He is admitted to the Western District Court of Oklahoma. He is a member of the Oklahoma Bar Association.

Tom is an active member in his church. He enjoys flying, collecting and restoring vintage automobiles and aircraft. Tom holds FAA private pilot certificate with instrument rating, T-28 type rating and A&P Mechanic Certificates. He is married to Shelly Williams and they have two daughters and three grandchildren.

R. Pope Van Cleef, Jr.

R. Pope Van Cleef is a Partner in the offices of Robertson & Williams. His practice focuses primarily in the areas of oil and gas, real estate and civil and commercial litigation. Additional practice areas include general corporate, commercial, and collection law. Mr. Van Cleef is the city prosecutor for Nichols Hills, a suburb of Oklahoma City.

Mr. Van Cleef completed his undergraduate degree at the University of Oklahoma, in 1974 where he received his B.A. Upon completion, he went to Oklahoma City University where he received his J.D. in 1976. Mr Van Cleef is a member of the Oklahoma State and County Bar Associations, the Federal Bar Association and is admitted to practice in the Western, Eastern and Northern Federal Districts of Oklahoma, the U.S. Court of Appeals for the Tenth Circuit and the Supreme Court of the United States of America.

Pope is an active member of his church and serves as trustee to The Anglican Foundation. He is married to Anita Van Cleef and they have two children.

James D. Tack, Jr.

James D. Tack, Jr. is a Partner in the offices of Robertson & Williams. Mr. Tack focuses his practice in the comprehensive representation of oil and gas exploration companies, mineral and royalty owners. Areas of practice include, acquisition of oil and gas properties and all types of oil and gas title opinions and other transactional matters. Mr. Tack also practices in mining, commercial transactions, and commercial litigation.

Mr. Tack attended Cornell University in Ithaca, NY, where he received his B.S. Engineering degree. Mr. Tack went to law school at Washburn University where he graduated cum laude with a J.D. degree. Mr. Tack is a member of the Oklahoma Bar Association and is also licensed to practice law in the Western District Court of Oklahoma and the 10th Circuit Court of Appeals. Mr. Tack is a member of the Oklahoma County, Oklahoma and American Bar Associations. He is also a member of the Oklahoma City Mineral Lawyers Association and Rocky Mountain Mineral Lawyers Association.

Jim is married to Ginnie Tack and they have two daughters.

Michael P. Kirschner

Michael P. Kirschner is a Partner in the offices of Robertson & Williams. Mr. Kirschner focuses his practice primarily in the areas of bankruptcy law, appellate and trial practice in State and Federal Courts, commercial law and transactions and banks and banking law, alternative dispute resolution, arbitration and mediation. Other areas he practices in are business law, insurance law and relationships of debtors and creditors.

Mr. Kirschner attended Westminster College before receiving a B.A. degree from Oklahoma City University. He also attended Oklahoma City University for his legal education earning a J.D. (High Honors) in 1968. Mr Kirschner is admitted to the U.S. Supreme Court, the U.S. Court of Appeals Fourth, Fifth and Tenth Circuits, and the United States District Courts for the Northern, Eastern, and Western Districts of Oklahoma. Mr. Kirschner is a founding member of the Luther Bohanon and William Holloway American Inns of Court. He is also a member of the Oklahoma, Oklahoma County and American Bar Associations and is a Fellow of the Oklahoma Bar Foundation.

Mike is an active member in his church in Oklahoma City and has served as a lay reader and its Chancellor for many years. He is married to Shirley Kirschner and they have two children and four grandchildren.

Nicholas S. Paynter

Nicholas Paynter is an associate attorney in the offices of Robertson & Williams. Mr. Paynter focuses his practice primarily on the acquisition of oil and gas properties, probate and civil litigation. His other areas of practice include corporate law, estate planning, trusts and estates.

Mr. Paynter received his undergraduate degree from the University of Oklahoma and his J.D. from the Oklahoma City University School of Law. He is a member of the Oklahoma and American Bar Associations and is also licensed to practice in the Western District of Oklahoma. Mr. Paynter is also a member of the Luther Bohanon American Inn of Court.

In 2006, Paynter interned at the Los Angeles branch of the Agency for the Performing Arts. Paynter’s work at APA included overseeing various business transactions within the entertainment industry. While in California, Paynter studied music publishing and sports law at the Donald E. Biederman Entertainment and Media Law Institute at Southwestern Law School in Los Angeles.

Nick is active as a volunteer for Special Olympics, Oklahoma and the Law Enforcement Torch Run. He is also a member of local Oklahoma City band Banana Seat. Nick is married to Nicole Paynter and they are the parents of a golden retriever named Henry.

Ilana Sharpe

Ilana Sharpe is an associate attorney in the offices of Robertson & Williams. Ms. Sharpe focuses her practice primarily in business, wills and trusts and oil and gas title law.

Ms. Sharpe earned her B.A. degree from Wesleyan University and her J.D. from the University of Oklahoma. She is admitted in the Western District of Oklahoma and is a member of the Oklahoma Bar Association. She is a member of the Luther Bohanon American Inn of Court.

Ilana is a member of the Junior League of Oklahoma City and serves as a day chair for the Oklahoma City Arts Festival. Ms. Sharpe loves to travel the world, speaks Italian and lived in Italy while in college. She also loves to sing and had a singing coach until she finished her undergraduate degree at Wesleyan University.

Cassidy L. Chew

Cassidy Chew is an associate attorney in the offices of Robertson & Williams.  Ms. Chew focuses her practice in oil and gas law.

Ms. Chew graduated from Oklahoma State University in 2008 with a Bachelor of Arts degree in Spanish and received her Juris Doctorate with Distinction from the University of Oklahoma, College of Law in 2012.  While at the University of Oklahoma, Ms. Chew attended the Study Abroad Program at Oxford University and was the Special Projects Editor for the American Indian Law Review.  She is a member of the Oklahoma Bar Association.

In 2006, Ms. Chew attended Centro Linquisto International, a total emersion Spanish language program in Antigua, Guatemala.  She is proficient in Spanish.

Cassidy is an active member with the Petro Pros Program through the Oklahoma Energy Resources Board, visiting elementary school classrooms to introduce kids to the oil and gas industry.  She is also a member of Young Professionals in Energy and Junior Hospitality.

Kecia K. Cole

Kecia K. Cole of counsel with Robertson & Williams. Mrs. Cole focuses her practice mainly in the area of oil and gas title examination. She also does civil litigation and commercial law.

Mrs. Cole attended Oklahoma State University where she received her B.S. degree. After completing her undergraduate degree, she became a Certified Public Accountant. Mrs. Cole later attended Oklahoma City University where she received her J.D. Mrs. Cole is licensed to practice law in Oklahoma in the Western District of Oklahoma. Mrs. Cole is a member of the Oklahoma Bar Association.

Kecia is an active member of her church. She is married to Wade Cole and they have two daughters.

Jean Head

Jean Head is of counsel with Robertson & Williams. Her practice focuses on the areas of oil and gas title examination, land acquisitions, and quiet title work.

Mrs. Head attended Colorado State University in Fort Collins, CO., earning her Bachelor of Sciences degree. Mrs. Head then went on to the University of Oklahoma and received her J.D. Mrs. Head is a member of the Oklahoma Bar Association and has been admitted to the Western District of Oklahoma.

Jean is active member in the Oklahoma City community. She is very involved in her church, where she has been clerk of the vestry, as well as served as secretary of Anglican Foundation. In the community she has served as president of the committee of the Heart Ball. She also has been a volunteer for the arts festival numerous times. She is married to Paul Head and has a daughter.