A Centers for Disease Control and Prevention employee was last seen 11 days ago, when he left work early after complaining that he felt unwell, Atlanta police said Friday.

Timothy Cunningham, 35, works as a commander in the U.S. Public Health Service and has responded to the Ebola virus and the Zika virus outbreaks, the CDC said. He holds two degrees from Harvard.

Police are now conducting a search for Cunningham and have enlisted the help of his family, friends and the alumni network of his alma mater Morehouse College.

Read moreCDC employee Timothy Cunningham went missing more than a week ago