Newly elected Democratic National Committee (DNC) Chairman Tom Perez is planning a complete reorganization of the organization. NBC News reports every employee has been asked to submit a resignation by April 15th:

Party staffs typically sees major turnover with a new boss, but the mass resignation letters will give Perez a chance to completely remake the DNC’s headquarters from scratch after staffing had already reached unusual low following a round of layoffs in December.

Immediately after Perez’s selection as party chairman in late February, an adviser to outgoing DNC Interim Chair Donna Brazile, Leah Daughtry, asked every employee to submit a letter of resignation dated April 15, according to multiple sources familiar with the party’s internal workings…

“What we’re trying to do is culture change,” [Perez] told NBC News between stops of a listening tour in Michigan Friday. “We’re repairing a plane at 20,000 feet. You can’t land the plane, shut it down, and close it until further notice.”

The new hires to replace outgoing staff are being guided by a Transition Advisory Committee consisting of about 30 members. NBC News reports there were progressive complaints about the make-up of the committee which led to some additional progressives being added.

Perez was elected after a fractious race in which he beat Rep. Keith Ellison and several other candidates. Perez was seen as an establishment candidate while Ellison was considered a more progressive option in line with Senator Bernie Sanders.

Perez replaced Interim Chair Donna Brazile who was engulfed in scandal last year after a leaked email revealed she had provided town hall questions to the Hillary Clinton campaign in advance. Brazile replaced former Chair Debbie Wasserman-Schulz who resigned last July over a scandal involving DNC favoritism toward Hillary Clinton. Several other top DNC staffers were fired after comments they made about Sanders faith (or lack thereof) came to light in emails released by Wikileaks.