Petfood manufacturer Mars Inc. ranked 19th on the list of the “World’s Best Multinational Workplaces,” compiled by the Great Place to Work Institute.

The rankings recognize the 25 best companies to work for worldwide. The list, published in cooperation with Fortune.com, is based on all rankings of the best employers published between September 2010 and August 2011.

To qualify for the global ranking, candidate firms must appear on at least five national Great Place to Work lists and have more than 5,000 employees, 40% of whom must be based outside the country that the company has its headquarters in.

According to Mars, the reasons for its selection included the development and introduction of an employee participation program, the appointment of an ombudsman at local sites and a larger percentage (27%) of women in senior management positions.