Deloitte is one of the Big Four professional services networks that was started in 1845 in London. Through mergers and name changes, it is now a global network of member firms in over 150 countries with 182,000 employees. Deloitte provides audit, tax, consulting, enterprise risk and financial advisory services across industries like consumer business, energy, life sciences, manufacturing, technology and more. It launched an online career management system powered by Insala to help employees better manage their careers, resulting in $12 million savings in turnover costs in the first year by improving career satisfaction and retention.