Emmy-winning journalist Sharyl Attkisson has announced her resignation from CBS News after working as the network’s Washington-based investigative correspondent for nearly two decades.

In a statement released Monday, Attkisson said, “It’s been one of life’s great privileges to work at CBS News, and I’m sincerely grateful for the many opportunities I’ve had.” 

“CBS News veteran Sharyl Attkisson is leaving the news division to pursue other endeavors. We appreciate her many contributions and we wish her well,” said CBS News spokeswoman Sonya McNair.

Attkisson first joined CBS News in September 1993 as a co-anchor of its overnight broadcast “Up to the Minute” before becoming a Washington-based correspondent in January 1995. She was awarded an Investigative Emmy in 2002 for her series of exclusive reports about mismanagement at the Red Cross and went on to win another Emmy in October 2013 for her reporting on “The Business of Congress.”

Politic is reporting that Attkisson’s departure is the result of “months of hard-fought negotiations,” stemming from Attkisson’s frustrations with what she perceived as a liberal bias and a lack of investigative reporting.

Attkisson also tweeted the news of her resignation Monday.