EXHIBIT 31.01A
CERTIFICATIONS PURSUANT TO
SECTION 302
OF THE SARBANES-OXLEY ACT OF 2002
I, Peter E. Kalan, certify that:
1. | I have reviewed this annual report on Form 10-K/A of CSG Systems International, Inc.; |
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. |
Date: | July 9, 2014 |
| /s/ Peter E. Kalan |
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| Peter E. Kalan |
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| Chief Executive Officer and President |
