John Holtzmuller currently serves as the Director of Financial Systems and Process at NiSource, a position held since January 2021, and previously directed Regulatory and Utility Planning at the same company. Prior experience includes serving as the State Finance Director at Columbia Gas of Ohio from August 2017 to January 2021 and holding various leadership roles at NiSource from May 2010 to August 2017, including Director of Planning and Manager of Strategic Financial Planning. Earlier professional experiences include a Senior Financial Analyst role at Sterling Commerce and a Senior Analyst position at Ferguson Consulting, in addition to experience in Tax & Assurance Services at Schneider Downs. John Holtzmuller holds an MBA from The Ohio State University Fisher College of Business, as well as dual Bachelor of Science degrees in Accounting and Management Information Systems from Miami University.
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