Torleiv Maseng (24 December 1946 – 11 July 2023) was a Norwegian engineer, who made some contribution to the Global System for Mobile Communications project.

His work included the standard use of channel estimation and the combination of equalization, error correcting codes and modulation in which the Viterbi algorithm was used by all components.

In July 1974 he joined SHAPE (Supreme Headquarters Allied Powers Europe) Technical Center in The Hague as a scientist in the Communications Division.

He also participated in the production of specifications for procurement of new satellite ground terminals, computer systems and modems for NATO.

In 2012 he received Aftenpostens readers award for the most significant invention in Norway since 1980, for his work on GSM early development.