On February 25, 2021, the board of directors of Yunhong CTI Ltd. appointed Frank Cesario, the Company's former President, Chief Executive Officer and Chief Financial Officer as a director and member of the Board's audit committee to fill the vacancy caused by Bret Tayne's resignation. In addition, the Board appointed Wan Zhang, a current member of the Board, to serve as Chairperson of the Audit Committee. In September 2020, Mr. Cesario joined Radiac Abrasives Inc. as its Chief Financial Officer. On September 10, 2020, Mr. Cesario resigned from all positions with the Company after serving as the Company's Chief Financial Officer from November 20, 2017 until June 2020, a director of the Company since December 31, 2019, and as the Company's President and Chief Executive Officer since January 2, 2020. Mr. Cesario brings nearly 20 years of CFO and controller experience at manufacturing entities. Prior to joining the Company, Mr. Cesario served in such roles with Nanophase Technologies Corporation and ISCO International Inc.