Prior to joining K&L Gates, Ms. Diehl served as Deputy Secretary of Legislative Affairs to the Pennsylvania Governor, a senior staff position that involved the development and implementation of legislative strategy intended to advance the Governor's legislative priorities for several state agencies, including the Department of Environmental Protection, the Department of Revenue, the Department of Transportation and the Pennsylvania Lottery. Ms. Diehl was directly and integrally involved in the enactment of several major legislative initiatives, including the historic transportation funding package of 2013, numerous pieces of legislation impacting energy and environmental policies and programs for the state, as well as, significant reforms intended to enhance operations and funding for the Pennsylvania Lottery. She was also directly involved with negotiations with the House of Representatives and the Senate relating to the enactment of the annual General Fund budget and related enactments.

Prior to working in the governor's office, Ms. Diehl served as Director of Legislative Affairs for the Pennsylvania Department of Revenue. During her tenure as Legislative Director, and prior to that, as Assistant Legislative Director, she advocated for legislative priorities related to taxation and the Pennsylvania Lottery, including significant business tax reform packages that dramatically changed state tax administration and tax compliance.

Before joining the Department of Revenue, Ms. Diehl worked in a senior staff capacity for the House Democratic Caucus. Her responsibilities included monitoring House floor activities and advising House Democratic Leadership in message development and legislative strategy.