Sitel was founded by James F. Lynch in 1985 as SITEL (Systems International TELemarketing), a customer care and teleservices company.
Lynch signed his first major client in 1988, Allstate Insurance, after which the business grew rapidly.
SITEL went public on the NASDAQ in 1985, and six months later moved to the New York Stock Exchange.
In 2006 SITEL had 70 call centers in 25 countries and over 30,000 employees.
In 2006 the company announced a merger with Client Logic, another outsourcing firm. After the merger the company announced that it would know be branded Sitel, now in lowercase letters.
Sitel is privately owned by private equity funds.
Today Sitel offers inbound and outbound sales, subscription renewal, database cleansing, lead generation, order fulfillment, customer acquisition, back-office processing, collections, and technical support.