Haley O’Neill, Member

Haley O’Neill became a Member of Murchison O’Neill, PLLC on January 1, 2025. At Murchison O’Neill, Haley counsels owners and operators of hazardous liquids and gas pipeline facilities on legal issues that impact the pipeline industry. Haley has vast experience in pipeline safety regulatory compliance, working with PHSMA, the Railroad Commission of Texas, and other certified State pipeline safety agencies. She counsels clients through agency inspections, investigations, enforcement, and informal hearings. In addition to pipeline safety regulatory compliance, she has become a trusted advisor for her clients on general pipeline matters, including operations, pipeline development, pipeline permitting, incident response, acquisitions and divestitures, and pipeline commercial matters. READ MORE

Roina Rivera, Member

Roina Rivera joined what was then the Murchison Law Firm in 2016. Roina represents a wide range of pipeline clients, including owners and operators of hazardous liquids and gas pipeline facilities. Roina’s experience encompasses regulatory compliance counseling, operations, and pipeline-related environmental matters. She represents clients with various regulatory concerns, including compliance, jurisdictional analyses, and defense of PHMSA enforcement matters. She also works closely with clients on business and corporate matters, including contracting, commercial insurance, and cybersecurity. READ MORE

Vince Murchison, Of Counsel

In 1992, Vince Murchison began his legal career with Jenkens & Gilchrist in Dallas where he practiced in the areas of upstream exploration and production and energy-related environmental law. During the next two decades Vince worked with some of the top firms in the profession, including Baker & McKenzie, Patton Boggs, and SNR Denton. In 2012, Vince decided to hang out his own shingle and open the Murchison Law Firm.

Vince’s environmental experience converged with the energy practice in the one-of-a-kind representation of Longhorn Pipeline. That 16-year representation involved asset due diligence, system acquisition, project development, permitting and authorizations, construction contracting, operational contracting, contract management, dispute resolution and, most importantly, navigating the most contentious and most thorough pipeline NEPA process of its time. Longhorn broke new ground in the realm of pipeline risk assessment, risk management and integrity management. READ MORE