Ousted GSA Administrator Martha Johnson has been invited to testify at congressional hearings next week. (Harry Hamburg/AP)

Four committees — yes, four — plan to hold hearings next week into the scandal that has rocked the General Services Administration and led to the dismissal of several top officials.

As The Post’s Lisa Rein reports today, the House Oversight and Government Reform Committee will go first on Monday with a hearing that has invited ousted GSA Administrator Martha Johnson to testify alongside Jeff Neely, a senior career official for the agency’s West coast region who has been placed on administrative leave.

Then on Wednesday, separate Senate transportation and appropriations panels plan to hold back-to-back hearings. On NBC’s “Meet the Press” on Sunday, Sen. Richard Durbin of Illinois, head of the appropriations subcommittee and the chamber’s No. 2 Democrat, called the misspending at the Western Regions conference in 2010 “an absolutely outrageous expenditure of taxpayers’ money.”

On Thursday, the House Transportation and Infrastructure Committee — which oversees GSA’s management of federal buildings — plans to hold the last hearing. In the House, the investigations “have been complementary,” according to Ali Ahmad, a spokesman for the Oversight panel.

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