Leanna spent over 10 years as the Director of Internal Audit and Director of Marketing at Pioneer Energy Services, a company bought by Patterson-UTI Energy, Inc. in 2021. She holds CPA and CISA licenses and has an extensive background in the oilfield services and downstream energy sectors.

Leanna graduated from the University of Wisconsin - Whitewater with a BBA in accounting and has an MBA from the Kellogg School of Management at Northwestern University. A native of Ukraine, she is a founder and current board member of Ukrainian San Antonio, a 501(c)(3) nonprofit organization that provides aid to those affected by the war in Ukraine. Khrystyuk served on the board of directors of San Antonio Education Partnership from 2009-2017 and was its chair from 2016-2018.