The National Labor Relations Board announced Wednesday that Jennifer Abruzzo will serve as acting general counsel for the government's top labor law enforcement agency, replacing the controversial Richard Griffin, who was appointed by former President Barack Obama.

President Trump's nominee for the post, Peter Robb, is awaiting full Senate confirmation.

Abruzzo is a 23-year veteran of the board, having been executive assistant to General Counsel Robert Meisburg, a President George W. Bush appointee. She served in the same capacity for Meisburg's replacement, Lafe Solomon, who served as acting general counsel until Griffin's confirmation.

The NLRB position is functionally the same as a chief executive officer. The agency is overseen by a five-member board, but the general counsel manages the agency's day-to-day activities and can initiate enforcement activities on his own. The board has about 1,600 employees, the vast majority of whom report directly to the general counsel.

Griffin, a former top lawyer for the International Union of Operating Engineers, led the board in an aggressive effort to reinterpret old rules to benefit labor organizing.

The Senate Health, Education, Labor and Pensions Committee confirmed Robb, a business lawyer, to replace Griffin in mid-October on a party-line vote.