Sitel is a company of Acticall Sitel Group headquartered in Miami, Florida.
The original SITEL (Systems International TELemarketing) was founded in 1985 by James F. Lynch, as a result of his purchase of HQ800, an answering service company owned by United Technologies. In June 1985, SITEL became the first publicly traded, independent teleservices company and was listed on the NASDAQ through an initial public offering (IPO). Six months later, they moved from NASDAQ to the NYSE as 'SWW'. On January 30, 2007, ClientLogic Corporation announced its acquisition of SITEL Corporation. The combined company would now be called Sitel (now in lowercase letters). and its headquarters moved to ClientLogic's headquarters in Nashville.
On 21 September 2015, Sitel announced it had been acquired by Groupe Acticall.
Video Sitel
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Source of article : Wikipedia