Professor, Department of Chemistry and Biochemistry, Halicioğlu Data Science Institute, San Diego Supercomputer Center, University of California, San Diego.

Associate Professor, Department of Chemistry, University of Kansas.

Distinguished Member of Technical Staff, Gas Phase Chemical Physics 08353, Combustion Research Facility, Sandia National Laboratories. Adjunct Professor, Dept. of Chemical Engineering, University of California, Davis.

Associate Professor, Departments of Chemical Engineering and Chemistry (By courtesy), MIT.

Professor of Chemistry, Department of Chemistry, University of Southern California.

Associate Professor, Department of Chemistry and Biochemistry, California State University, Los Angeles.

Herman B Wells Professor, Department of Chemistry, Adjunct Professor of Physics, Indiana University, Bloomington.

Associate Professor, Department of Chemistry, Colorado State University.