Exhibit 99.1

TeleTech Announces Additional $25 Million Share Repurchase Authorization

ENGLEWOOD, Colo., August 15, 2013 — TeleTech Holdings, Inc. (NASDAQ: TTEC), a leading global provider of data driven, technology-enabled customer engagement solutions, announced that its Board of Directors has approved an incremental $25 million authorization under its share repurchase program.

“The additional authorization continues to demonstrate the Board of Directors’ confidence and commitment in our business strategy and value-driven deployment of our strong balance sheet and cash flow generation,” said Kenneth Tuchman, TeleTech’s chairman and chief executive officer.

In the first six months of 2013, TeleTech repurchased approximately 1.4 million shares of common stock for a total of approximately $31 million.  As of June 30, 2013, there was $19.4 million authorized for future share repurchases.

The share repurchase authorization does not have an expiration date and the pace of repurchase activity will depend on factors such as levels of cash generation from operations, current stock price and other factors.

ABOUT TELETECH

TeleTech, founded in 1982, is a leading global provider of data-driven, technology-enabled services that puts customer engagement at the core of business success. The Company offers an integrated platform that combines analytics, strategy, process, systems integration, technology and operations to simplify the delivery of the customer experience for Global 1000 clients and their customers. This holistic multichannel approach improves customer satisfaction, increases customer loyalty and drives long-term profitability and growth. From strategic consulting to operational execution, TeleTech’s more than 39,000 employees deliver results for clients in the automotive, communications and media, financial services, government, healthcare, technology, transportation and retail industries. Through the TeleTech Community Foundation, the Company leverages its innovative leadership to ensure that students in underserved communities around the globe have access to the tools and support they need to maximize their educational outcomes. For additional information, please visit www.TeleTech.com

FORWARD-LOOKING STATEMENTS

Statements in this press release that relate to future results and events (including statements about future financial and operating performance) are forward-looking statements based on TeleTech’s current expectations. Actual results and events in future periods could differ materially from those projected in these forward-looking statements because of a number of risks and uncertainties including: achieving estimated revenue from new, renewed and expanded client business as volumes may not materialize as forecasted, especially due to the global economic slowdown; the ability to close and ramp new business opportunities that are currently being pursued or that are in the final stages with existing and/or potential

Investor Contact Paul Miller 303.397.8641 Media Contact Jeanna Blatt 303.397.8507

clients; our ability to execute our growth plans, including the successful integration of acquired companies and the sales of new products; the possibility of lower revenue or price pressure from our clients experiencing a business downturn or merger in their business; greater than anticipated competition in the customer management industry, causing adverse pricing and more stringent contractual terms; risks associated with losing or not renewing client relationships, particularly large client agreements, or early termination of a client agreement; the risk of losing clients due to consolidation in the industries we serve; consumers’ concerns or adverse publicity regarding our clients’ products; our ability to find cost-effective locations, obtain favorable lease terms and build or retrofit facilities in a timely and economic manner; risks associated with business interruption due to weather, fires, pandemic, or terrorist-related events; risks associated with attracting and retaining cost-effective labor at our delivery centers; the possibility of asset impairments and restructuring charges; risks associated with changes in foreign currency exchange rates; economic or political changes affecting the countries in which we operate; changes in accounting policies and practices promulgated by standard setting bodies; new legislation or government regulation that adversely impacts our tax obligations, healthcare costs or the customer management industry; service interruptions, security threats or other disruptions at our facilities relating to our computer and telecommunications equipment and software systems; our ability to develop and protect our intellectual property and contractual rights and avoid infringement; disruptions in the supply chain of the Customer Technology Services segment; risks associated with unauthorized disclosure of sensitive or confidential client and customer data; compliance with credit facility covenant restrictions; and our ability to obtain financing and manage counterparty credit risks from financial institutions.  A detailed discussion of these and other risk factors that could affect our results is included in TeleTech’s SEC filings, including its Annual Report on Form 10-K for the year ended December 31, 2012.  The Company’s filings with the Securities and Exchange Commission are available in the “Investors” section of TeleTech’s website, which is located at www.teletech.com.  All information in this release is as of August 15, 2013. The Company undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company’s expectations.

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Investor Contact Paul Miller 303.397.8641 Media Contact Jeanna Blatt 303.397.8507