July 14, 2022, Wayne F. Irmiter was appointed as Senior Vice President, Chief Accounting Officer of Cornerstone Building Brands, Inc. (the 'Company'). Mr. Irmiter, age 56, was previously employed by Wilsonart International Holdings, LLC, where he served as Vice President, Chief Financial Officer from January 2020 until March 2022, as Interim Chief Financial Officer and Vice President, Global Controller from June 2019 until January 2020, and as Global Controller from November 2016 until January 2020. Prior to joining Wilsonart International Holdings, Mr. Irmiter served as Senior Vice President & Chief Accounting Officer of Berkshire Hathaway Energy Company from November 2002 until March 2014.

Prior to joining Berkshire Hathaway Energy Company, Mr. Irmiter served in a series of roles with increasing responsibility at Gateway, Inc., Rubbermaid Inc., O'Sullivan Industries, Inc., KPMG and PricewaterhouseCoopers. Mr. Irmiter has a B.A. in Accounting from the University of Northern Iowa and is a certified public accountant. Mr. Irmiter will report to Jeffrey S. Lee, Executive Vice President and Chief Financial Officer, who also held the title and role of Chief Accounting Officer prior to the appointment of Mr. Irmiter.