Engineer Port Construction and Repair
The Camp Gordon Johnston WWII Museum knows of several of these units that trained here at CGJ:
1055th, 1057th, 1058th, 1059th, 1060th, 1061st and the 2055th
The Corps of Engineers has a terrific history of the Transportation and Engineer Company efforts in the war against Germany, which covers the 1057th, 1058th and 1061st.
This is the PDF of that history found online (outside link)
Another good resource is this wikipedia page on transportation companies in the European Theater (outside link)