Starting in 2008, Hann was acting OER deputy director, while at the same time serving as the acting director for the NIMH Office of Autism Research Coordination at the National Institute for Mental Health (NIMH).[1] In that capacity, she provided leadership and management for the congressionally mandated Interagency Autism Coordinating Committee (IACC).[2] She led the IACC's first national strategic plan.[5] In 2010, she was appointed deputy director of OER.[2]