SAN FRANCISCO (KCBS) – The ringleader of an embezzlement ring at the San Francisco Public Utilities Commission is headed to prison.

San Francisco District Attorney George Gascon said 47-year-old Donnie Thomas, the electrical supervisor at Treasure Island, pleaded guilty to four felonies. The embezzlement occurred from at least 2003 to 2007.

READ MORE: Curry Scores 32 Points as Warriors Top Trail Blazers

“You have several people that were working with a couple of local businesses. They were ordering supplies and then converting the property for personal use,” Gascon said.

KCBS’ Barbara Taylor Reports:

Gascon said Thomas also ran his own electrical business on city time and using city supplies, but didn’t pay unemployment insurance.

READ MORE: Federal Court Blocks COVID-19 Vaccine Mandate for California Prisons

PUC General Manager Ed Harrington said Thomas and four other men from the Hetch Hetchy Power Crew all participated in the theft.

“In a very isolated area of Treasure Island, they were colluding together to do this and then working with two outside vendors,” said Harrington.

All five men have pleaded guilty and five others are still facing charges.

Thomas received a three year prison sentence, fines of almost $400,000 and is now cooperating in the investigation.

MORE NEWS: Bay Area Bargain Shoppers Find Black Friday Is Not What It Used To Be

(Copyright 2011 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)