The goal of the Dr. Ingalls’s current research is to apply the tools of systems and control theory in a reverse-engineering process. Contributions are being made in two directions. The first is by adding to to the body of theoretical results which can be applied to models of biochemical systems, for example by providing error bounds on sensitivity calculations, or by analysing methods of stochastic simulation. The second is by drawing analogies between man-made and biological control systems, for example, by comparing signal transduction networks to electrical amplifiers, or by identifying control motifs in biological regulators.