Atlanta Police say that a Centers for Disease Control employee has been missing for more than a week.

Timothy Cunningham was last heard from on Feb. 12. He reportedly called his employer, the CDC, at 7 a.m. and told them he was sick.

“It is unusual for him not to contact his family,” the Atlanta Police Department said. “If any information is known on his whereabouts, please contact 911 or the Atlanta Police Homicide/Adult Missing Persons Unit at 404-546-4235.”

According to the CDC, Cunningham is a team lead with CDC’s Division of Population Health.

“Dr. Cunningham trained with CDC as an Epidemic Intelligence Service officer,” the CDC website says. “His research has been oriented towards understanding health differences related to race/ethnicity, socioeconomic status, gender, and geography. Dr. Cunningham has also deployed for numerous public health emergencies, including Superstorm Sandy, Ebola, and Zika. He is an active member of the American Public Health Association and the American College of Epidemiology. Dr. Cunningham received his S.M. and Sc.D. from the Harvard T.H. Chan School of Public Health.”