A States police appeal for information has been issued, as his whereabouts remain unknown. Mr Graham (59) was last seen at about 11 am on Tuesday in the area of First Tower and Victoria Avenue.
Police are asking Mr Graham or anyone who has either seen him or knows where he is to call 612612.
The missing man has headed Aviation Beauport for many years. The company operates the private aviation terminal on Avenue de la Commune in St Peter.
