Staffing provider ManpowerGroup Inc. (NYSE: MAN) and PEO and payroll services provider Paychex Inc. (NASD: PAYX) were named to the Ethisphere Institute’s 2018 World’s Most Ethical Companies list in the staffing and outsourced services category. Ethisphere is an international think-tank that promotes best practices in corporate ethics and compliance.

The list also recognizes online networking company LinkedIn Corp. (NYSE: LNKD) in the technology category and Fluor Corp. (NYSE: FLR), which has a staffing division, in the engineering and design services category. IT services and outsourcing providers Wipro Limited (NYSE: WIT) and Paris-based Capgemini Group are also on the list in the business services and information and delivery services categories respectively.

2018 marks ManpowerGroup’s eighth consecutive year on the list. Rochester, NY-based Paychex, which provides PEO and other services, is on the list for its 10^th year.

Since 2007, Ethisphere’s list has highlighted those companies who “recognize their critical role to influence and drive positive change in the business community and societies around the world and work to maximize their impact wherever possible.” The 2018 list, available online, includes 135 companies spanning 23 countries and 57 industries.