Katherine Archuleta, who stepped down Friday as director of the Office of Personnel Management, listed her roundly criticized strategic IT plan as one of her proudest accomplishments in her two-year tenure at the embattled agency in a "farewell" note posted over the weekend.

Her IT plan has been repeatedly questioned by OPM's inspector general, and was the focus of criticism on Capitol Hill during the two weeks of grueling hearings she testified about two massive breaches of OPM's data files.

"I'm proud of the work we have done to develop the REDI (Recruitment, Engagement, Diversity and Inclusion) initiative and our IT strategic plan," she wrote. "These efforts have transformed our ability to serve our customer agencies and ensure that the federal government is able to attract, hire, engage, and develop a talented and diverse federal workforce."

Meanwhile, the federal workers union that named her a defendant in a class-action lawsuit says Archuleta's decision to step aside will not solve the issues that allowed hackers to get their hands on sensitive data on 22.1 million current, former and potential federal workers and their friends and families.

"While the data breaches happened on Archuleta's watch, the lapses that gave hackers access into the systems were the result of decisions made long before Archuleta became director," American Federation of Government Employees National President J. David Cox Sr. stated over the weekend. "Firing one individual solves nothing. Congress should recognize that preventing future breaches requires funding. Budget austerity has consequences, and we're seeing one of them right now."

In the final post of her OPM director's blog, Archuleta said that heading up the agency was "the highlight of my long career in public service." She offered President Obama her resignation on Friday, a day after OPM revealed that the original estimate of how many Americans were affected by two separate incidents grew from 4.2 million to 22.1 million.

"I believe it is best for me to step aside and allow new leadership to step in, enabling the agency to move beyond the current challenges and allowing the employees at OPM to continue their important work," she said.