The owner of a Los Angeles-based firm, and 4 of his workers, pleaded guilty to their roles in a scheme to underpay wages for public works projects in Orange County, a prosecutor said.

Mackone Development one, Scott Sung Yang, 46, of Los Angeles, pleaded guilty Monday to felony charges of underpaying wages on a public works project and filing false documentation, said Orange County Deputy District Attorney Donde McCament.

Yang is expected to be sentenced March 12 to 60 days in jail and placed on 5 years of formal probation, the prosecutor said.

Yang’s project superintendent, Michael John Ferrin, 42, of San Pedro, pleaded guilty to a misdemeanor count of not keeping accurate records of work hours. He was sentenced to 30 days of Caltrans service, McCament said.

Yang and Ferrin were ordered to pay $100,000 to the victim witness emergency fund, the prosecutor said.

Part of the case involved Yang’s contract for work at Harvey Street Elementary School in Santa Ana in 2012. Workers were paid $10 to $14 per hour despite the contractor’s agreement to pay a wage of about $44 per hour, according to court documents.

No Sung Pak, 76, of Hollywood, a subcontractor who owned a cabinet- making business, pleaded guilty in August of last year to not paying the proper amount of wages and was sentenced to 120 days in jail, McCament said.

Co-defendants Craig Roger Pierce and Robert Dequilla, who worked as foremen, and Myra Cruz, who was a bookkeeper and office manager, also pleaded guilty to misdemeanor charges of labor code violations and are expected to be ordered to perform 30 days of Caltrans service, McCament said.

As part of the plea deal, none of the defendants can work in the public works industry again, McCament said. Yang must sell his business and will lose his contracting license, she added.

Sentencing was put off to give them time to sell the business and find employment elsewhere, McCament said.