**Exhibit 31.2**

 

**CERTIFICATIONS**

 

I, Regina M. Paolillo, certify that:

 
| 1.     | I have reviewed this quarterly report on Form 10-Q of   TeleTech Holdings, 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;                                                              |
|   |                                                                                                                                                                                                                                                                                                                                                                            |
| 3.     | Based on my knowledge, the financial statements, and other   financial information included in this report, fairly present in all material   respects the financial condition, results of operations and cash flows of the   registrant as of, and for, the periods presented in this report;                                                                                   |
|   |                                                                                                                                                                                                                                                                                                                                                                            |
| 4.     | The registrant’s other certifying officer(s) and I   are responsible for establishing and maintaining disclosure controls and   procedures (as defined in Exchange Act Rules 13a-15(e) and   15d-15(e)) and internal control over financial reporting (as defined in   Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and   have: |
|   |                                                                                                                                                                                                                                                                                                                                                                            |
|   | a)                                                                                                                                                                                                                                                                                                                                                                              | Designed such disclosure controls and procedures, or   caused such disclosure controls and procedures to be designed under our   supervision, to ensure that material information relating to the registrant,   including its consolidated subsidiaries, is made known to us by others within   those entities, particularly during the period in which this report is being   prepared; |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
|   | b)                                                                                                                                                                                                                                                                                                                                                                              | Designed such internal control over financial reporting,   or caused such internal control over financial reporting to be designed under   our supervision, to provide reasonable assurance regarding the reliability of   financial reporting and the preparation of financial statements for external   purposes in accordance with generally accepted accounting principles; |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
|   | c)                                                                                                                                                                                                                                                                                                                                                                              | Evaluated the effectiveness of the registrant’s disclosure   controls and procedures and presented in this report our conclusions about   the effectiveness of the disclosure controls and procedures, as of the end of   the period covered by this report based on such evaluation; and |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
|   | d)                                                                                                                                                                                                                                                                                                                                                                              | Disclosed in this report any change in the registrant’s   internal control over financial reporting that occurred during the   registrant’s most recent fiscal quarter (the registrant’s fourth fiscal   quarter in the case of an annual report) that has materially affected, or is   reasonably likely to materially affect, the registrant’s internal control   over financial reporting; and |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
| 5.     | The registrant’s other certifying officer(s) and I   have disclosed, based on our most recent evaluation of internal control over   financial reporting, to the registrant’s auditors and the audit committee of   the registrant’s board of directors (or persons performing the equivalent   functions):                                                  |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
|   | a)                                                                                                                                                                                                                                                                                                                                                                              | All significant deficiencies and material weaknesses in   the design or operation of internal control over financial reporting which   are reasonably likely to adversely affect the registrant’s ability to record,   process, summarize and report financial information; and |
|   |                                                                                                                                                                                                                                                                                                                                                                            |   |
|   | b)                                                                                                                                                                                                                                                                                                                                                                              | Any fraud, whether or not material, that involves   management or other employees who have a significant role in the registrant’s   internal control over financial reporting. |

 

Date: August 5, 2015

 

 
|   | By:    | /s/ REGINA M. PAOLILLO                       |
|--------|--------|----------------------------------------------|
|   |   | Regina M. Paolillo                           |
|   |   | Chief Financial Officer                      |
|   |   | (Principal Financial and Accounting Officer) |

 

----