WASHINGTON (AP) Retired neurosurgeon Ben Carson will not be taking a position in President-elect Donald Trump’s administration.

Republican Dr. Ben Carson speaks during a rally for Republican presidential candidate Donald Trump Friday, Nov. 4, 2016, at The Classical Academy in Colorado Springs, Colo. Dr. Carson and Oklahoma Gov. Mary Fallin campaigned for Trump.  (Christian Murdock/The Gazette via AP)

Republican Dr. Ben Carson speaks during a rally for Republican presidential candidate Donald Trump Friday, Nov. 4, 2016, at The Classical Academy in Colorado Springs, Colo. Dr. Carson and Oklahoma Gov. Mary Fallin campaigned for Trump. (Christian Murdock/The Gazette via AP)

Carson business manager Armstrong Williams tells The Associated Press that Carson has opted out of being considered for any cabinet or other administration positions, including leading the Department of Health & Human Services and the Department of education.

Carson had never been formerly offered a position in the Trump administration, but Williams says the president-elect had made clear he wanted his former rival-turned-adviser in some role.

Williams says Carson “always knew that he could be more effective with the president-elect outside the administration.”