Cummins Inc. has once again earned a top rating from an organization that champions human rights.

The Columbus-based diesel engine manufacturer announced on Wednesday that it has been awarded a perfect score in the 2017 Corporate Equality Index, a national bench marking survey and report on corporate policies and practices related to LGBT workplace equality, administered by the Human Rights Campaign Foundation. Jon Mills, Cummins’s director of external communication, says that this marks the twelfth consecutive year that the company has been awarded that distinction.

The Human Rights Campaign Foundation is the largest U.S. civil rights organization for lesbian, gay, bisexual and transgender employees. The organization says it has more than 1.5 million members and supporters.

“At Cummins, we have a long legacy of embracing the opportunities created by a diverse organization,” said Chairman and CEO Tom Linebarger. “Diversity and inclusion throughout our company allows us to attract and retain the best talent and fuels a more innovative work environment allowing Cummins to be a strong and successful company.”

The HRC’s Corporate Equality Index rated 1,043 businesses in the report, which evaluates LGBT-related policies and practices including non-discrimination workplace protections, domestic partner benefits, transgender-inclusive health care benefits, competency programs, and public engagement with the LGBT community. Cummins efforts in satisfying all of the CEI’s criteria results in a 100 percent ranking and the designation as a “Best Place to Work” for LGBT Equality.