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Tim Knewitz

Chief Financial Officer

Tim Knewitz is Argonne National Laboratory’s Chief Financial Officer and Senior Director of Argonne’s Financial Management and Procurement Services directorate.


Prior to joining Argonne, Tim was at Sandia National Laboratories for 30 years. He was their Chief Financial Officer since May 2017. Prior to that role, Tim was the Controller at Sandia, where he guided the direction of 25 managers and 240 employees to achieve excellence in financial operations by focusing on quality, customer relations, and talent development. 

Tim is a member of the National Laboratories CFO Executive Council and has extensive experience working with the U.S. Department of Energy and the national lab complex. 

Tim received a Master of Accountancy and a Bachelor of Accountancy from New Mexico State University. He is a Certified Public Accountant.