Appointments:
Auburn University (1974-present), Professor 1984-Present, Alumni Professor 1994-1999
l'Universit\'e de Paris-Sud, Visitor, Summer 1995
Mathematical Science Research Institute, Berkeley, Visitor, 1994-1995
Courant Institute of Mathematical Sciences, Visitor, Fall 1987
Oklahoma State University, Visitor, 1982-1983

Awards:
Alfred Jurzykowski Award 1995
College of Sciences and Mathematics Research Excellence Award 1996
Auburn University Creative Research Award 1999
Auburn University Distinguished Graduate Faculty Lecturer 2002
Waclaw Sierpinski Medal 2007

AMS, MAA, AWM, and SIAM Committees:
AMS Southeastern Section Program Comm., 1996-1998
AMS Council, member at large, 1996-1999
AMS Committee on the Profession (CoProf), 1996-1999
AMS Notices Editor Search Committee, 1999
AMS Editorial Boards Committee, 1999-2002
MAA Chauvenet Prize Committee, 2000- 2003
AMS-MAA Joint Program Comm. for JMM, 2002-2003
SIAM SIAG Activities Group Moser Lecture Prize Comm., 2002-2003
AMS Nominating Committee 2003-2005
AWM Executive Committee 2004-2008