On October 28, 2021, Phung Ngo-Burns, NexTier Oilfield Solutions Inc.?s (the ?Company?) Chief Accounting Officer and Treasurer advised the Company that she would be leaving the Company to pursue other opportunities, with her final day at the Company being on or about January 7, 2022. Mrs. Ngo-Burns?s decision was not the result of any disagreement with the Company but rather a desire to pursue other interests and business leadership opportunities.