Onex has agreed to sell Sitel Worldwide to Groupe Acticall, a French CRM company. Employing over 61,000 people and operating in 108 facilities across 21 countries, Sitel is a provider of outsourced customer care. Its employees support clients with CRM contact center services designed to build customer loyalty, increase sales and improve efficiency. Onex has backed the company since 2007. Société Générale and BNP Paribas are providing debt financing for the transaction.