His earlier published work focussed on occupational stress, in particular Karasek's Demands-Support model, and Fletcher's Catastrophe model. He also published research on the effectiveness of different resume layouts in the International Journal of Selection and Assessment.
Most recently he has developed the Chaos Theory of Careers [1] that characterizes career behaviour as the fractal patterns that emerge from individuals characterised as complex dynamical systems. Careers and career paths are deemed to be non-linear, subject to continual and unpredictable change and phase shift and limited by the operation of an attractor: Point (Goal); Pendulum (Role); Torus (Routine) and Strange (Complex) Attractors. The model challenges traditional notions of "fit" between people and careers; and emphasises the unpredictable nature of careers.
