Colleen M. Kelley, president of the National Treasury Employees Union, has announced plans to retire this year after the labor group’s convention in August. NTEU is the second largest federal worker labor group.

In a memo to NTEU chapter presidents, Kelley said she will not seek reelection after ending her fourth term, and will  be retiring to spend time with her family in Pittsburgh.

The NTEU will hold an election to choose a new national president at its convention this summer.

Kelley was elected for her first four-year term as NTEU national president in August 1999. Prior to that, she worked for 14 years as an Internal Revenue Service employee and rose through the ranks of the union, serving in leadership positions, including president of a Pittsburgh chapter and NTEU national executive vice president.

“I am proud of my NTEU career and the state of our union today,” the union official said in her memo.

During her tenure as NTEU president, Kelley helped win enhanced retirement benefits for Customs and Border Protection officers and convinced the IRS to stop outsourcing its debt-collection activities to private companies. She also fought against a proposed overhaul of the Department of Homeland Security’s personnel system that was unpopular among the labor group’s members.

Kelley also helped expand NTEU’s ranks, organizing employees who are not traditionally unionized such as attorneys at the Securities and Exchange Commission, scientists at the Food and Drug Administration and financial regulatory employees at the National Credit Union Administration, among others.

The union covers 150,000 employees in 31 U.S. government agencies and departments. It is second in size only to the American Federation of Government Employees.