CERTIFICATION OF CHIEF EXECUTIVE OFFICER
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, John J. Engel, certify that:
1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A, for the fiscal year ended December 31, 2019, of WESCO International,
Inc.; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
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Date:
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March 9, 2020
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By:
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/s/ John J. Engel
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John J. Engel
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Chairman, President and Chief Executive Officer
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