Field Telegraph Corps, designation Ing 3, was a Swedish engineering unit within the Swedish Armed Forces which served in various forms between 1902 and 1937. The main part of the unit was located in the Stockholm Garrison in Stockholm, Uppland.

The Svea Engineer Corps, designation Ing 1, was a Swedish Army engineer unit that traced its origins back to the 19th century. It was disbanded in 1997. The unit was garrisoned in Uppland and Södermanland.