Mrs. Dana Holden is the Vice President of Value Chain Integration for Marathon Petroleum based in San Antonio. This includes responsibility for Blue Water Marine, Loss control & Quality Assurance as well as Logistics Commercial Development. Dana has worked in the refining business since 2001. She held various analytics and trading positions in foreign crude supply and trading for over 13 years between Valero Energy and Tesoro Corporation. She continued her experience in the energy industry in various leadership roles focusing on logistics from 2014 forward for Tesoro/Andeavor. In 2018 she relocated to Findlay, Ohio to lead the Crude Oil Scheduling & Analytics team for Marathon Petroleum and was named to her current role in August 2021. While she enjoyed her time in Ohio, she is thankful to have moved back to San Antonio, the place she considers home, in January 2022.

Prior to starting her career in refining, Dana dedicated a year to community service through the AmeriCorps program in San Antonio. Through AmeriCorps, she assisted at Brackenridge High School in an ESL classroom and spent time working on special projects for the San Antonio Police Department. She was later hired by SAPD and became the program coordinator for the Volunteers in Policing program.

Dana continued to volunteer for various programs over the years while working for Valero, Tesoro, and Marathon Petroleum. Dana is also currently on the advisory boards for Junior Achievement of South Texas and KIPP San Antonio.

Dana is a graduate of St. Mary’s University in San Antonio, Texas where she completed a B.A. in English, a minor in Spanish, and M.A. in International Relations.

Dana is married to Brian and is the mother of two daughters, Devon, age 23, who attends Texas Tech University, and Brooke, age 13, who attends Tex Hill Middle School. In addition to volunteering, she enjoys traveling, playing golf, and spending time with her family.

Maria Mejia serves as the Director of Howard Energy Mexico, overseeing all aspects of the company's international investments from business ideation, contract negotiations, project execution, regulatory compliance, and continued operations. Her responsibilities include the 200-mile Era pipeline, a cross border line that connects major economic hubs in Northeast Mexico, around the Monterrey area, with reliable and affordable natural gas produced in Texas.

Prior to joining Howard Energy, Maria was an analyst at S&P Global Commodity Insights where she advised clients on market fundamentals including supply, demand, prices, and infrastructure for various energy commodities to drive decisions in investments, trading an energy policy. Earlier in her career, Maria was a management consultant at Oliver Wyman, and she also completed a two-year Rotational Program at Sequent Energy Management. She holds a degree in Finance with an Energy Specialization from Tulane University.

Lisa Trefger has over 29 years of experience as a Certified Public Accountant and over 20 years in the Oil and Gas Industry. She currently works for NuStar Energy and is the Executive Director of Commercial Optimization. Lisa specializes in Budget/Forecasting and Data Analytics and leads efforts for cross departmental collaboration and meaningful understand of organizational data. 

Lisa has served on the Board of Dress for Success in various capacity since 2015. She is passionate about the mission and wants Women to recognize their unique talents and gifts in order to further develop their career and their individual contribution to their family and Communities.

Lisa graduated from the University of North Texas in 1990 with a degree in Accounting, Certified Public Accountant in 1994 and received her MBA from the University of Texas at San Antonio in 2011. She is a founding member of The Women’s Energy Network of South Texas Chapter and was the sole recipient of the Leadership Award from her UTSA EMBA Class. Her greatest joy is her three amazing children, Taylor, Mackenzie and Bradley and husband of 31 years Eddie.