ZS Associates is a consulting and professional services firm focusing on consulting, software, and technology, headquartered in Evanston, Illinois that provides services for clients in private equity, healthcare, and technology. ZS was founded in 1983 by Prabhakant Sinha and Andris Zoltners, who worked together as professors of marketing at the Kellogg School of Management at Northwestern University The firm employs more than 7,067 employees in 24 offices in North America, South America, Europe and Asia. ZS works with corporations within the consumer products, financial services, pharmaceutical, industrial products, telecommunications, and transportation industries. It provides Advisory, Technology, and Operations support to its clients. ZS has been recognized with several award related to its work environment, its employees and its success in the consulting industry.