Biographical Data






2515 Speedway, MS C1402


Austin, Texas 78712


Telephone (512)-471-1301



Senior Research Scientist, McDonald Observatory, September 1993- November 2014 (retired)

Superintendent, McDonald Observatory, November 2009 – November 2014

Program Director, National Science Foundation, Feb 2006 – Aug 2009 (rotator IPA)

Associate Director, McDonald Observatory, September 1987- August 2001

Commissioning Manager for the 9.2m Hobby-Eberly Telescope, July 1997-September 1999

Assistant Director, McDonald Observatory, December 1980-August 1987

Research Scientist and Assistant to the Director, McDonald Observatory, September 1978-November 1980

Assistant Professor of Astronomy, University of Texas, September 1972-August 1978

Assistant Dean, University of Texas, September 1973-January 1974 (half-time)

Research Scientist Associate IV, University of Texas, September 1971-August 1972

W.J. McDonald Fellow, McDonald Observatory, September 1970-August 1971



University of Toronto (Ontario), September 1966-August 1970
   Ph.D. (Astronomy), December 1970
     Dissertation: "Near Infrared Photometry of Long Period Variable Stars"

   M.Sc. (Astronomy), February 1968
     Thesis: "A Search for Optical Variability in Seyfert Galaxies"

University of Rochester (N.Y.), September 1962-June 1966
   B.S. with distinction in Astrophysics, June 1966


Recent Professional Service:

Technical Editor, StarDate radio program, June 1991-

Technical Editor, StarDate magazine, January 1991-

Gemini Observatory Science and Technology Advisory Committee, October 2015 - May 2019

Gemini Review Panel for OCTOCAM PDR, April 2018

NSF/DOE Review Panel for LSST, September 2017

Gemini Review Panel for OCTOCAM CoDR, August 2017

NSF Program Review Panel for NRAO, December 2014

NASA Review Panel for the Stratospheric Observatory for Infrared Astronomy Science Mission Operations readiness review, April 2013

Scientific Organizing Committee, Stellar Pulsation Conference, Grenada, Spain, September 2012

NSF Gemini Management Review Panel, March 2011


Professional Societies:

International Astronomical Union: Member of Commissions on Pulsating Stars, on Binary and Multiple Star Systems, on Astronomical Photometry and Polarimetry

American Astronomical Society

Astronomical Society of the Pacific