Glob was most noted for his investigations of Denmark's bog bodies such as the Tollund Man and Grauballe Man, mummified remains of Iron and Bronze Age people found preserved within peat bogs.

His anthropological works include The Bog People: Iron Age Man Preserved, Denmark: An Archaeological History from the Stone Age to the Vikings, and Mound People: Danish Bronze-Age Man Preserved.

Glob was also heavily engaged in archaeology of the Middle East and led several scientific expeditions there.

In the 1950s he discovered and excavated the ruins of the ancient Dilmun civilization on the island country of Bahrain.

He later married Harriet Roepstorff and they had five children, including the ceramic artist Lotte Glob.