From Jessica Kerr‘s definition:’
Symmathecist: (sim-MATH-uh-sist) an active participant in a symmathesy.
A symmathesy (sim-MATH-uh-see, coined by Nora Bateson) is a learning system made of learning parts. Software teams are each a symmathesy, composed of the people on the team, the running software, and all their tools.
(source)