Officials say 64-year-old Joseph Herbert went missing Nov. 30 from Mullica Township.
He is described as a white male, 6 feet tall, with a thin build, green eyes and gray hair.
He was last seen wearing a black and white flannel jacket, and possibly a gray baseball cap that says "Tennessee."
Approximately 150 volunteers searched the area for clues to Herbert's whereabouts.
Another large scale search is planned for sometime Monday.