Power Solutions International, Inc. announced that the Board of Directors (the “Board”) of the Company appointed Constantine Xykis as Chief Technical Officer, effective April 24, 2023 (the “Effective Date”). Mr. Xykis, age 64, had served as Interim Chief Executive Officer since June 1, 2022 and Chief Technical Officer since March 15, 2021. Mr. Xykis has more than 30 years of professional experience in multi-disciplined engineering areas including senior management and executive positions.

Since his appointment as Chief Technical Officer, Mr. Xykis has been responsible for the oversight of the Company's advanced product development, engineering design and analysis, on-highway engineering, applied engineering, emissions and certification, Waterford, Michigan engineering operations, program management and product strategic planning. Since joining the Company in 2010 and until his appointment as Chief Technical Officer in March 2021, Mr. Xykis served as Vice President of Engineering for the Company. Prior to joining PSI, his previous professional experience in multi-disciplined engineering areas including senior management and executive positions includes service at various companies including Cummins Inc., and Generac Power Systems, both of which are publicly traded.

Mr. Xykis also served as Adjunct Professor of Mechanical Engineering and Mechanics at the Milwaukee School of Engineering and previously served on the audit and compensation committees of the Board of Directors of Image Sensing Systems, a publicly traded company on NASDAQ, from 1996 to 2001. Mr. Xykis also served on the advisory board of CEGE, College of Science and Engineering, University of Minnesota for eight years. Mr. Xykis holds a Bachelor's degree in Structural Engineering, a Master's degree in Vibration/Dynamics, and a PhD.

in Structural/Applied Mechanics from the University of Minnesota, Minneapolis.