Johan Georg Harmenberg Åkerman (born 8 September 1954) is a Swedish Olympic and world champion épée fencer.

[2] His son Karl Harmenberg fenced épée for Harvard University, and as a junior in 2008-09 won the gold medal at the NCAA Regionals and was selected to All-Ivy League second team.

[7] He left MIT two years early (he would have graduated in 1977) and returned to Sweden, having been drafted by the Swedish Army in the summer of 1974.

[17][18] He also won a bronze medal in Team Épée at the 1979 World Championships in Hamburg, Germany.

At the 1980 Moscow Olympic Games, Harmenberg won a gold medal in the Individual Épée.

[26][27][28][29][24][30] In September 2019, Harmenberg joined Beactica Therapeutics, a Swedish drug discovery company, as a clinical advisor.

[32] Harmenberg has also had a distinguished career in medical pharmacology, publishing a variety of papers relating to viral immunology.