Justin D. Keller

Lolly Chauppette is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Lolly, who practices law in Dallas, Texas, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lolly is held by other top lawyers in the same geographic and legal practice area.

Shawn C. Helms is co-head of the Firm’s Technology Transactions & Outsourcing Practice. Shawn has broad experience in the areas of information technology, digital health, AI, telecommunications and outsourcing. He focuses his practice on complex transactions involving technology and intellectual property, including business process outsourcing (BPO) and information technology outsourcing (ITO), licensing, cloud computing arrangements (infrastructure as a service (IaaS), software as ...

Mary McNulty represents corporations and partnerships in IRS audits, appeals, and tax litigation and provides tax planning for partnerships, limited liability companies, and S corporations. She specializes in Federal tax procedural issues, including statutes of limitations, interest, penalties, privilege, and TEFRA partnerships, and in partnership tax issues relating to private equity, oil and gas, wind energy, real estate, and exempt organizations.

Lewis D. Zirogiannis is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Lewis D., who practices law in Dallas, Texas, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lewis D. is held by other top lawyers in the same geographic and legal practice area.

William N. Warren joined Kelly Hart in 1993 and is a partner in the firm’s Litigation practice group. He attended Baylor University, where he earned his Bachelor of Arts in 1989, and Baylor University Law School, graduating with his Juris Doctor degree, cum laude , in 1993. Mr. Warren has considerable experience representing clients in state and federal courts in a broad range of complex civil litigation matters, including business torts, securities issues, construction claims, products...

John Leininger joined Otteson Shapiro's Dallas office in January, 2016. Mr. Leininger is a key member of the firm’s Bankruptcy & Creditors’ Rights and Litigation practice areas. He focuses on core bankruptcy matters, bankruptcy litigation, and general civil litigation. He was named to The Best Lawyers in America© 2021 for his work in Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law. After graduating law school, Mr. Leininger served as a law clerk ...

S. Wesley Butler is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration. S. Wesley, who practices law in Dallas, Texas, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which S. Wesley is held by other top lawyers in the same geographic and legal practice area.

Member, UT Harry Ransom Center Advisory Council

Every family law matter, just like every person, is different. As such, Greg Beane provides each client with personalized attention throughout each step of the case. A careful listener, he focuses on his clients’ individual goals as he strives to obtain a favorable result. Greg’s background in accounting and finance have helped him to lead clients through one of the most significant financial transactions of their lives while protecting and preserving their assets for the future. ...

Abby Ewing has built a family law practice representing people from all walks of life, from single mothers to CEOs and entrepreneurs during some of the most difficult times in their lives. She’s shown a unique ability to understand and relate to those she represents at the most fundamental level, both inside and outside of the courtroom. Ms. Ewing has experience in complex property division cases, as well as pre- and postmarital agreements and child support and custody matters, includin...