Bernard Madoff’s former director of operations for investments was handed a 10-year prison sentence Monday and ordered to forfeit $155 billion.

Daniel Bonventre, 67, was sentenced for his part in the company’s multibillion-dollar fraud, and four of his co-defendants are expected to learn their fate in coming days. The government has said they were the most culpable defendants after Madoff for a fraud that cost thousands of investors nearly $20 billion.