AUGUSTA — Maine Department of Health and Human Services Commissioner Mary Mayhew named a new director of the Office of Child and Family Services.

Jim Martin, who has been leading the Office of Aging and Disability Services, will become the director of the child and family services office.

A DHHS spokesman said last month that Director Therese Cahill-Low and Guy Cousins, director of the Office of the Substance Abuse and Mental Health Services, were no longer working for the department. He declined to provide further details, saying it is a personnel matter.

Martin has worked for DHHS since 2008 and managed 300 staff members as director of the aging and disability services office.

Gary Wolcott, associate director for care and intervention, has been named acting director of Martin’s former office.