The decision maker and the executor operates with different cognitive models.
The decision maker
The decision maker operates within an environment of incomplete information. He takes in conflicting signals from the environment to figure out the underlying Markov Chain that holds his environment altogether.
A successful decision marker minimizes the price paid for knowledge of each section of the Markov Chain.
Each success unlocks more resources that could be redeployed to this activity.
Inner fortitude is the primary trait required to navigate the high failure rate inherent to the nature of this activity.
Perpetuate accumulation of mental models from different domains reduces taken to form judgement while  increasing overall batting average.
The executor
The executor operates within an environment that has been made predictable by the activities of the decision maker.
He is predisposed towards systems, structures and processes. A successful executor measures and optimizes with the goal of increasing yield from a well defined process while minimizing costs.
Disciplined consistency is the primary trait required to ensure continued excellence in this repetitive activity.
Concerns
A strong decision maker profile with a weak executor profile will feel repressed/bored when forced to operate as an executor in a structured environment.
An strong executor profile with a weak decision maker profile will feel overwhelmed when required to operate within an unstructured environment.