Mark D. Siegmund
Partner

Mark D. Siegmund is a seasoned trial lawyer who brings the discipline, resilience, and strategic mindset honed during his service in the United States Marine Corps to his thriving legal practice. As a proud Marine, Mark faced some of the most demanding challenges imaginable, both physically and mentally, shaping him into the tenacious and determined advocate he is today.
During his time in the Marine Corps, Mark learned to remain calm and focused under pressure, qualities that seamlessly translate into the legal arena. No legal challenge, regardless of complexity or stakes, can match the intensity of leading and executing missions in high-stakes environments. His military service instilled an unwavering confidence and a “failure is not an option” attitude, which he applies to every case he handles.
Mark has secured multiple successful jury verdicts on both sides of the “v”, including one of the largest jury verdicts in the U.S. in 2023. He has built a reputation as a fearless advocate, handling high-stakes litigation with a strategic focus on trial success. Whether representing individuals or corporations, Mark approaches every case with meticulous preparation, a deep understanding of the law, and an eye toward trial from the outset. Prior to beginning in private practice, Mark clerked for United States Federal District Judge Alan D Albright, giving him a unique and advantageous perspective for handling litigation matters.
With an impressive track record and an unwavering dedication to the art of trial advocacy, Mark is a trusted ally for those seeking justice, and a formidable opponent in any courtroom.
Education
- Baylor University School of Law, J.D., summa cum laude, highest graduate, 2019
- Texas A&M University, B.S.
Bar & Court Admissions
- Licensed in Texas
- United States Court of Appeals for the Fifth Circuit and Federal Circuit
- United States District Court for the Northern, Southern, Eastern, and Western Districts of Texas
- Intellectual Property
- Commercial Litigation
- Local Counsel
- Top 20 Verdict in the U.S. in 2023, Top Verdict
- Super Lawyers Rising Stars, Thomson Reuters, 2023-present
- Steve Dillard Practice Court Award, 2019
- Top Five Speaker Award, M.D. Anderson Moot Court Competition, 2017
- Repeat Precision v. DynaEnergetics – Successfully defended DynaEnergetics in a patent infringement lawsuit involving oil and gas technology, resulting in the jury finding in favor of DynaEnergetics.
- IGT v. Zynga, Inc. – Successfully defended Zynga in a patent infringement lawsuit resulting in a finding by the jury of no infringement and that the patent was invalid.
- Textron Innovations LLC v. DJI – Represented Textron in a multi-patent case related to drone technology. Successfully secured a $279 million jury verdict against DJI in the Western District of Texas.
- Paltalk v. Cisco – Represented Paltalk in a patent case resulting in a $67.8 million jury verdict against Cisco.
- Pittsburgh Logistics Systems v. GRTM – Successfully defended GRTM in a trade secret misappropriation dispute, resulting in a finding by the jury of no misappropriation.
- Halliburton v. ProFrac – Represented Halliburton in a multi-patent infringement lawsuit concerning electric fracturing technology that resulted in a favorable resolution for Halliburton.
- AML IP, LLC v. Adorn Boutique, LLC – Successfully defended Adorn Boutique LLC in the Western District of Texas in a patent infringement lawsuit and achieved a favorable settlement for client.
- Broadband iTV v. AT&T – Successfully defended AT&T in a patent infringement lawsuit in the Western District of Texas and helped obtain a favorable resolution of the case.
- USB Bridge Solutions LLC v. ADATA Technology Co., Ltd – Defended ADATA Technology Co. in a patent infringement lawsuit in the Austin Division of the Western District of Texas, and successfully achieved a transfer to the Central District of California.
- Future Link Systems v. Realtek Semiconductor – Representing Realtek in a patent case related to semiconductor technology.
- DynaEnergetics Europe GmgH and DynaEnergetics US, Inc. v. Schlumberger Technology Corporation – Represented DynaEnergetics in a patent case related to perforating operations in the well completion process in the oil and gas industry.
- Webroot, Inc. and Open Text, Inc. v. CrowdStrike – Represented Webroot and Open Text in a patent infringement lawsuit concerning cybersecurity and malware detection technology that resulted in a favorable resolution for Webroot and Open Text.
- Estech Systems v. Howard Midstream Energy Partners – Successfully defended Howard Midstream Energy Partners in a patent infringement lawsuit and achieved a motion for summary judgement of no infringement.
- RSB Spine LLC v. Orthofix Medical Inc. et al – Represented RSB Spine LLC in a patent infringement lawsuit concerning medical technology that resulted in a favorable resolution for RSB Spine in the Eastern District of Texas.
- Crossmark, Inc. v. C.A. Carlin – Represented Crossmark, Inc. in a trade secret misappropriation case that resulted in a favorable resolution for Crossmark, Inc.
- McLennan County Bar Association, Member
- McLennan County Young Lawyers Association, Member
- Live Oak Classical School, Board Member
- Speaker: “Waco Division Jurisprudence,” Houston Intellectual Property Law Association, May 20, 2021
- Speaker: “Fire Side Chat with Judge Alan D Albright: Litigating in the Nation’s Hottest IP Docket,” 58th Annual Conference on Intellectual Property Law, November 9, 2021
- Speaker: “Patent Litigation Panel,” LA Bioscience Ecosystem Summit, 2023
- Speaker: “WDTX Jury Verdicts, Jury Makeup, and What It Means,” Austin Intellectual Property Law Association, June 14, 2023
- Author and Co-Founder: Western District of Texas IP Blog