Education
Born in Krummsee, Ostholstein, Germany, Deising attended primary and grammar school in Kronshagen and Kiel, and passed the school-leaving examinations in 1975, after which he did military service (1975–1976). He completed his studies at Kiel University with a Diploma in Agricultural Engineering, after which he worked as a Biology Assistant at the same university (1982–1987), ending with a dissertation entitled Physiological and biochemical investigations on nitrate reduction in the bryophyte Sphagnum.
