Arthur McMiler 
- Fields has led ATI as CEO since 2024 and as board chair since May
- Her professional experience includes posts at IDEX, GE Energy, Alcoa and Boston Consulting Group
- L3Harris is expanding missile propulsion output under recent Lockheed Martin awards
L3Harris Technologies said Thursday that it has added Kimberly Fields, chair, president and CEO of ATI Inc., to its board.
What Will Kimberly Fields Bring to the L3Harris Board?
Sam Mehta, L3Harris president and CEO, pointed to Fields’ history of growing operations and delivering consistent results. He said her experience in complex manufacturing will be valuable as the company ramps up output, adds capacity and tightens execution enterprise wide.
Fields said she intends to help guide L3Harris’ transformation and expansion and to deliver innovation for the warfighter, whom she described as the company’s most important customer.
Who Is Kimberly Fields?
Fields became ATI’s board chair in May 2026, two years after becoming CEO. She joined the company in 2019 to run its Flat Rolled Products Group as executive vice president, then oversaw the Advanced Alloys & Solutions and High Performance Materials & Components segments. She was named chief operating officer in 2022 and president in 2023.
Before ATI, she led IDEX ‘s industrial and energy unit as group president. IDEX produces fluidics systems and engineered specialty products. Fields previously held senior posts at Alcoa, Owens Corning, GE Energy, EVRAZ North America and Boston Consulting Group, covering manufacturing, operations, commercial and strategy functions.
How Does the Appointment Align With L3Harris’ Production Expansion?
The board addition comes as L3Harris scales up missile propulsion manufacturing. In late September, the company received an Lockheed Martin contract worth over $6 billion, excluding escalations. Over seven years, it will build a dedicated solid rocket boost motor plant and add Liquid Divert and Attitude Control System capacity for the Terminal High Altitude Area Defense, or THAAD, interceptor.
That deal builds on a July framework agreement with the Department of War to quadruple L3Harris’ THAAD propulsion output. Earlier in September, Lockheed Martin awarded the company $4.7 billion for PAC-3 Missile Segment Enhancement propulsion work.
