Big Sun Solar Announces New Vice President of Finance


(San Antonio, TX, Feb. 10, 2023) – Big Sun Solar, a commercial solar energy company in Texas whose mission is to build a renewable future for all, has named Olena “Leanna” Khrystyuk its first Vice President of Finance.

Khrystyuk 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 joins Big Sun Solar at a critical period of growth for our company and the solar industry, and her role as Vice President of Finance is instrumental in our continued success. We have no doubt her oil and gas experience will help us meet the growing demand,” said Big Sun Solar co-founder and CEO Robert Miggins.

Much of the increased interest in solar energy has been spurred by incentives introduced in the federal Inflation Reduction Act of 2022. Big Sun Solar increased its staff by 40% last year and continues to expand. San Antonio has been ranked as the first city in Texas and fifth in the nation for total solar photovoltaic (PV) capacity.

“I’m happy to be a part of a team that is making a positive impact on people’s lives and the health of our planet,” said Khrystyuk. “Renewable energy is a viable replacement for traditional energy sources, and solar energy leads that effort. We need to boost adoption of solar in the commercial and residential markets, which will prompt continued improvement in technology and efficiency.”

Khrystyuk 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 the San Antonio Education Partnership from 2009-2017 and was its chair from 2016-2018.


Big Sun Solar provides Texas businesses with custom-designed rooftop, carport, and ground-mount solar systems to help counter rising energy costs and meet corporate sustainability goals. With a Net Promoter Score of 88, Big Sun Solar is an industry leader in customer satisfaction trusted by prominent brands including Vitesco Technologies, Cavender Auto Group, Rush Enterprises, and Baywood Hotels, and has installed close to  20 megawatts of solar in the past seven years. Additionally, Big Sun has built 6.5 megawatts of community solar through its partnership with CPS Energy. With a passion to build a more renewable future for the next generation of Texans, Big Sun Solar is based in San Antonio and serves businesses across the state. To learn more about Big Sun Solar, visit Follow Big Sun Solar on Instagram and Twitter @BigSunSolar and Facebook at