As the IRS fired thousands of workers across the country on Thursday, many laid-off employees walked out of the headquarters in Washington, D.C., for the last time.

One fired IRS worker, who exited the building with a heavy suitcase and stuffed duffle bag, told ABC News he was originally hired to make the IRS more efficient.

“I was brought in to do data analytics and automation,” he said, adding that his colleagues were “surprised and hurt” since the “understanding was that I was brought in to make things more efficient” and the government would retain people with his technical skill set.

He said his job “modernized” IRS data infrastructure and streamlined compliance work, noting the irony in that the stated mission of the federal workforce cuts by Elon Musk’s Department of Government Efficiency is precisely to make the government more efficient.

Sources told ABC News the IRS is expected to lay off more than 6,000 probationary employees across the country starting Thursday — about 6% of the total IRS workforce. One source familiar with the matter told ABC News more than 100 people are being fired across the Washington offices, including more than 60 terminated from IRS headquarters.

However, the layoffs are expected nationwide, with hundreds expected in Texas, New York, Georgia, Florida, Tennessee and Pennsylvania.

When asked whether he thought the firings would affect this tax filing season, the fired worker said: “You can only imagine with so many people being let go and so much information and potential being lost that people probably can expect disturbances.”

“I wish there was more thought put into the long-term impact that some of these decisions will have on not just the American taxpayers but the American people,” he added.

He said he’s worked in a variety of industries, including doing nanotechnology research, biotechnology research and engineering, but that he felt the most motivation and mission while working for the federal government.

Another IRS employee who was wiping away tears described the impact she believed this will have on the future of the IRS. While she still has a job, she said these layoffs are “gutting” the IRS and will mean less enforcement and fewer people to respond to concerns from taxpayers.

She also noted that much of the IRS workforce is older and near retirement age. The probationary workers who were recently hired included the “best and the brightest” who represented the future of the IRS, she said, adding that all of that is now being taken away.

Another fired IRS worker told ABC News he was just three weeks shy of no longer being a probationary employee. He disputed Musk’s and Trump’s claims that the firings are improving efficiency.

“I know that the people that I have worked with … work really hard, and so … if you’re measuring efficiency by productivity, certainly not. If you’re measuring efficiency by morale, absolutely not,” he said. “I accepted this role in order to help our country fight bad guys.”