- Judge Griggsby was previously Judge of the U.S. Court of Federal Claims from 2014 to June 2021, when she was confirmed to U.S. District Court for the District of Maryland.
- As an Assistant U.S. Attorney, Griggsby stood up to polluters and a federal contractor accused of defrauding the U.S. government.
- Gribbsby represented the United States in a case against Toyota for Clean Air Act violations involving over two million cars sold by the company between 1996 and 1998. Griggsby helped secure a settlement that required Toyota to spend $20 million on a project to make cleaner vehicles, improve emission control compliance, and pay a $500,000 civil penalty.
- Griggsby represented the United States in a case against two of Washington D.C.’s largest property managers for failing to disclose lead-based paint hazards in their buildings. Griggsby helped secure an agreement that required the landlords to fix roughly $500,000 worth of lead-based paint hazards in their units, pay civil fines, and pledge $10,000 towards community-based projects to lessen childhood lead-poisoning in Washington D.C.
- Griggsby has worked on a range of issues on Capitol Hill.
- From 2004 to 2005 Griggsby was Counsel for the U.S. Senate Select Committee on Ethics.
- From 2006 to 2008, Griggsby was privacy counsel for the U.S. Senate Committee on the Judiciary.
- From 2008 to 2014, Griggsby was chief counsel for privacy and information policy for the U.S. Senate Committee on the Judiciary.