Major General Kjell Bertil Ingvar Koserius (26 October 1943 – 4 December 2002) was a Swedish Air Force officer.

[1] Koserius graduated from the Swedish Air Force Flying School in 1962 and was commissioned as an officer with the rank of second lieutenant.

He was at the time maintaining a long-term substitute as head of the unit for human resource management (C FS/Persl) in the Air Staff.

[4] On 1 April 1992, Koserius was appointed permanent head of the same unit in the Air Staff and on 1 July the same year, he was promoted to senior colonel.

[5] He was succeeded by colonel Nils Ullgren on 1 January 1993 when Koserius was posted to staff of the Middle Military District (Milo M) as chief of the Operations Command.