President Obama has asked departing deputy chief of staff Alyssa Mastromonaco to be a part of his post-presidential work, the longtime Obama aide said in an exit interview with CBS's Charlie Rose.

Mastromonaco, who has worked with Obama since his time in the U.S. Senate, will step down in May. But she is expected to help organize Obama's presidential library and foundation.

"We're just, like, linked," Mastromonaco said. "We've been through a great adventure and as he — what he said was, 'You can go and you can take some time off. But, you know, we're together forever. And I need you — I need you around.' "

In her current position, Mastromonaco is tasked with overseeing presidential personnel, helping Obama fill Cabinet vacancies and hire senior administration staff. She also coordinates with the White House Military Office to oversee operations of Camp David and the military aircraft that transports the president and works with the Secret Service on security matters affecting the first family.

"I'm the person that everyone comes to," she quipped. "I have the answer for everything."

But Mastromonaco said the "pace of life" at the White House had become "sort of unsustainable."

She credited a close working relationship with the president for her professional success.

"I think over the years of decision making and navigating some tough times, you know, your mettle's really tested," she said. "And I think that I proved to him that his success was my number one priority. That my hard work on his behalf wasn't self-interested. And that you know, I had good judgment."

Anita Breckenridge, who currently manages the president's daily schedule and serves as the gatekeeper for the Oval Office, will take over for Mastromonaco as deputy chief of staff.

Breckenridge worked for Obama's 2008 presidential campaign, and was appointed as chief of staff for the National Endowment for the Arts after the president's election. In May 2011, she came to the White House to work as the president's personal assistant.