Amy Friedheim, a senior analyst with the Internal Revenue Service who worked on international tax matters, died July 22 at a hospice in San Francisco. She was 53.

She had lung cancer, her mother, Robin Friedheim, said.

Amy Friedheim was born in Seattle and moved to Washington as a child. She later lived in Reston, and she was a graduate of Herndon High School.

She received a bachelor’s degree in international relations from the University of Southern California in 1981 and then served in the Peace Corps in Lesotho for two years.

After returning to Washington, Ms. Friedheim received a master’s degree in economics from the University of Maryland in 1989.

She held jobs with the U.S. International Trade Commission and Department of Agriculture before becoming an economist with the IRS in 1991.

Later in the 1990s, she worked with the accounting firm PricewaterhouseCoopers, as a consultant and as a risk manager with GE Capital in Connecticut, New Jersey and Ireland.

From about 2002 to 2008, she worked in Washington for what became the Government Accountability Office as an international tax investigator assigned to the Senate Finance Committee.

She rejoined the IRS in Washington in 2009 and was later assigned to the San Francisco office as a senior analyst in an international corporate tax unit.

Survivors include her mother, Robin Friedheim of Carlsbad, Calif.; and a sister.

— Matt Schudel