His pioneering work in statistical predictions and descriptions of random and deterministic processes has influenced the physics of amorphous solids and glasses, classical mechanics, and biophysics.

In 1975, he obtained his PhD from the University of Rochester under Elliott Waters Montroll for a thesis entitled A Stochastic Theory of Anomalous Transient Photocurrents in Certain Xerographic Films and of the 1/f Noise in Neural Membrane.

Initially he worked at the University of Maryland, College Park, then in 1983 he joined Office of Naval Research (ONR) and started their nonlinear dynamics program in 1984.

In 2021 published "An Unbounded Experience in Random Walks with Applications" (World Scientific Pub) He was elected to Fellow of the American Physical Society in 1993.

In 2008, he was honored with a festschrift to mark his 60th birthday, entitled 25 Years of Nonlinear Dynamics at ONR, based on a conference held on Amelia Island, Florida, July 20–22, 2008.