In short: 

NSW CFMEU Assistant Secretary Michael Greenfield has resigned as he fights allegations of corruption. 

Premier Chris Minns had previously called for his resignation. 

What's next? 

Mr Greenfield's father Darren Greenfield remains at the helm of NSW CFMEU as the state secretary. 

The son of embattled NSW Construction, Forestry and Maritime Employees Union (CFMEU) boss Darren Greenfield has resigned from the union after calls from Premier Chris Minns for he and his father to stand down. 

Michael Greenfield released a statement on Monday announcing he would leave is role as assistant secretary, effective immediately. 

He said the decision came after "weeks of sensationalised media reporting and relentless government scrutiny, which has placed unbearable pressure on his family". 

"I have always maintained my innocence in relation to bribery charges brought against me three years ago in 2021," he said. 

"Attempts to inflate and agitate matters that have been public knowledge since 2021, and frequently the subject of media scrutiny, are insincere and undermine my right to presumed innocence.

"The extreme pressure that my family has been placed under due to the extreme Government and media bias has left me no choice but to step down to protect my family."

Both Greenfield men have been under intense scrutiny since Nine newspapers reported claims a police camera hidden in the ceiling of the CFMEU's Sydney office captured thousands of dollars in cash being handed over to guarantee union support on a building site in 2021. 

The allegations were made just days after another investigation which alleged underworld figures infiltrated the union's Victorian branch.

The federal government will introduce laws this week to force the CFMEU to accept an administrator, after the construction union failed to consent to doing so.

Workplace Relations Minister Murray Watt said "urgent action" was needed after the construction union failed to accept the application for an administrator to be appointed.