Since 1982

Founded in 1982 and based in Houston, Hollo & Associates, LLC provides advisory and operational services across the energy industry. Our team brings decades of proven experience delivering strategic consulting to the oil and gas sector as well as to other areas of the evolving energy landscape.

Through our educational series, we help clients analyze shifting energy trends and develop forward-looking strategies to shape the future direction of their organizations. Our mission is to support the energy industry—across all segments—with integrity, efficiency, and commitment to long-term value creation.

Meet the Team

At Hollo & Associates, our strength lies in the depth and diversity of our expertise. Led by founder Reuven Hollo, PhD, our team brings together seasoned professionals with backgrounds in academia, operations, and strategic consulting. Together, we offer a rare combination of technical knowledge and practical experience—united by a shared commitment to advancing the future of energy through thoughtful leadership and collaborative solutions.

  • Founder & Principal

    Dr. Reuven Hollo has over 40 years of experience in the oil and gas industry, with a career spanning private energy investments, operational leadership, and academic teaching focused on the evolving energy landscape. His multidisciplinary expertise blends hands-on energy industry knowledge with analytical rigor, providing clients with strategic guidance across a broad spectrum of oil, gas, and emerging energy investments.

  • Senior Operations Manager

    Mr. Mullinix has over 30 years of experience in reservoir management and oilfield operations. He has managed drilling, workover, and stimulation programs across a wide range of basins including the Permian, Mid-Continent, South and East Texas, the Williston Basin, Michigan, and the Gulf of Mexico. Education: B.S. in Engineering, Texas A&I University (1975)

  • Director of Administration


    Ms. Moore has been with the company since 1998 and plays a central role in the firm’s internal operations. She oversees accounting, engineering support and coordination across departments, ensuring operational efficiency and organizational continuity.  Education: BBA in Accounting, University of Houston–Downtown