Experience and Activities:

Regular appointments:

• 1992--2016 University Professor of Computational Statistics, George Mason University, Fairfax, Virginia.
• 1979--1992 Director of Research and Design, IMSL, Inc., Houston, Texas.
• 1974--1979 Assistant Professor, then (1978) Associate Professor (with tenure), Department of Statistics, Iowa State University, Ames, Iowa.

Visiting or temporary appointments:

• 2018 Lecturer, Georgia Institute of Technology, Shenzhen, China.
• 2015 Visiting Professor, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China.
• 2004--05 Research Fellow, National Agricultural Statistics Service (USDA), Fairfax, Virginia.
• 1996--98 Program Director, Statistics (MPS/DMS), National Science Foundation, Arlington, Virginia.
• 1993--94 Senior Research Fellow, Bureau of Labor Statistics (USDoL), Washington, DC.
• 1989--92 Adjunct Professor of Biometry, University of Texas Health Science Center, Houston, Texas.
• 1987--92 Adjunct Professor, Department of Statistics, Rice University, Houston, Texas.
• 1986, 1989 UNDP Expert (Consultant), United Nations FAO, Duty Station: New Delhi, India.
• 1985 Visiting Professor, Department of Mathematics, University of Texas at Arlington, Arlington, Texas.
• 1980--87 Adjunct Associate Professor, Department of Mathematical Sciences, Rice University, Houston, Texas.
• 1979 Visiting Professor, Mathematical Sciences, University of Texas at Dallas, Richardson, Texas.
• 1973--74 Lecturer, Department of Statistics, Texas A&M University, College Station, Texas.
• 1971--73 Research Assistant, Department of Statistics, Texas A&M University, College Station, Texas.
• 1969--71 Instructor, Department of Mathematics, Stephen F. Austin State University, Nacogdoches, Texas.
• 1966--69 High School Teacher, Cottonport, Louisiana.
• 1964--66 Gap years: factory worker, North Carolina; ranch hand, Oklahoma; high school science teacher, Mississippi.

Editorships:

• Editor, Wiley Interdisciplinary Reviews: Computational Statistics, 2013--.
• Senior Editor, Communications in Statistics, 1994--.

Previous editorial activities:

• Associate Editor, ACM Transactions on Mathematical Software, 1994--97.
• Associate Editor, Journal of Computational and Graphical Statistics, 1992--96.
• Associate Editor, The American Statistician, 1989--90.
• Member of Advisory Editorial Board of Computational Statistics Quarterly, 1985--90.
• Member of Editorial Board of Computational Statistics and Data Analysis, 1983--90.
• Editor, Current Index to Statistics, 1981--84.
• Area Editor, Modeling (published by Technical Committee on Simulation, IEEE), 1980--81.
• Reviewer for Mathematical Reviews of AMS, 1977--94.
• Co-editor, Algorithms Section, Communications in Statistics, 1977--94.
• Member of Editorial Board of the Mathematical Tables Publication Project of the Institute of Mathematical Statistics, 1976--86.

Professional and learned societies:

• Fellow of the American Association for the Advancement of Science (AAAS).
• Fellow of the American Statistical Association (ASA).
• Elected Member of the International Statistical Institute (ISI).
• Fellow of the Royal Statistical Society.
• Served on Boards of Directors of ASA, of the Interface Foundation, and of the American Federation of Information Processing Societies.
• Held several national offices in ASA.
• Invited speaker at many conferences.
• Lecturer in Visiting Lecturer Program of ASA and affiliated statistical societies (1982-90).

Selected publications, by decade:

• 1975 (with H.O. Hartley) Data monitoring criteria for linear models, in A Survey of Statistical Design and Linear Models (edited by J.N. Srivastava), North Holland Publishing, Amsterdam, 197--207.
• 1981 (with P.P. Talwar) Detecting a scale shift in a random sequence at an unknown time point, Applied Statistics 30, 301--304.
• 1990 Computer implementation of random number generators, Journal of Computational and Applied Mathematics 31, 119--125.
• 2009 (with L. AlSumait, D. Barbara, and C. Domeniconi) Topic significance ranking of LDA generative models, European Conference on Machine Learning and Principles of Knowledge Discovery in Databases, 67--82.
• 2016 (with B.S. Lee, R.S. McIntyre, N.S. Park, D.A. Chiriboga, Y.Lee, and M.A. McPherson) A data mining algorithm for personalized medicine in schizophrenia, International Journal of Neuropsychopharmacology 19, 246--246.

Books:

• 1980 (with W.J. Kennedy) Statistical Computing, Marcel Dekker (Routledge), ISBN: 978-0824768980, 591 pages.
• 1998 Numerical Linear Algebra for Applications in Statistics, Springer, ISBN: 978-1-4612-0623-1, 221 pages.
• 2002 Elements of Computational Statistics, Springer, ISBN: 978-0387954899, 420 pages.
• 2003 Random Number Generation and Monte Carlo Methods, Second Edition, Springer, ISBN: 978-0387216102, 380 pages.
• 2009 Computational Statistics, Springer, ISBN: 978-0387981444, 727 pages.
• 2021 Statistical Analysis of Financial Data with Examples in R, CRC Press, ISBN: 978-1032173467, 666 pages.
• 2024 Matrix Algebra: Theory, Computations, and Applications in Statistics, Third Edition, Springer, ISBN: 978-3031421433, 725 pages.