On March 7, 2024, ATI Inc. announced that it has appointed Michael B. Miller to serve as Vice President, Corporate Controller and Chief Accounting Officer. Mr. Miller, age 48, most recently was Chief Accounting Officer of Digital Turbine Inc., a technology company focused on solutions for the advertising space, from August 2021 to February 2024. Prior to that, he served as Vice President and Corporate Controller of CyrusOne Inc., a publicly traded real estate investment trust, where he oversaw accounting, consolidation and internal control activities.

From 2009 to 2017, Mr. Miller served in various accounting positions with L3 Technologies, an aerospace and electronics systems company, including as Aerospace Systems Segment Vice President and Controller from 2015 to 2017 and Assistant Corporate Controller from 2009 to 2014. Mr. Miller also previously served as a senior audit manager for both PricewaterhouseCoopers, LLP and KPMG, LLP. Mr. Miller is a certified public accountant.

He received his BBA in Accounting and Finance from the University of Cincinnati in 1998.