SAN DIEGO >> A retired Navy officer has pleaded guilty to conspiracy for his role in a worldwide scheme to bilk the Navy out of millions of dollars for port services.

Federal prosecutors say Edmond Aruffo entered the plea Thursday in San Diego. He faces up to five years in prison.

Aruffo retired from the Navy as a lieutenant commander in 2007. He became manager of Japan operations for Glenn Defense Marine Asia, a Singapore-based company that serviced Navy ships and submarines in the Pacific.

Authorities say the company bribed Navy officials to win inflated contracts that cost the Navy more than $20 million.

Authorities say Aruffo and others overcharged the Navy by as much as $2.5 million for Japanese port service.

He’s the fourth person to plead guilty. Three others await trial.