Exhibit 31.1
CERTIFICATION
I, Colin Dyer, certify that:
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| | 1. | I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of Jones Lang LaSalle Incorporated; and |
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| | 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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| Dated: February 27, 2014 | | | | /s/ Colin Dyer |
| | | | | Colin Dyer |
| | | | | Chief Executive Officer and President |
