In 2005 he served as a Fulbright Senior Specialist Scholar at Tallinn University at the Department of Psychology.
In 2003–2004 he served as a Fulbright Scholar, Lecturing Award at Tallinn Pedagogical University at the Department of Psychology.
Lomax has also served as a statistical consultant on numerous projects such as NSF, NIMH, FIPSE, and Corporation for Public Broadcasting.
Lomax is the author of the following books: An Introduction to Statistical Concepts for Educational and Behavioral Sciences,[1] Statistical Concepts: A Second Course for Education and the Behavioral Sciences,[2] and A Beginner’s Guide to Structural Equation Modeling (co-authored with R. E.
Currently Lomax is the Associate Dean of Research and Graduate Studies at The Ohio State University[4] and continues to teach a reduced number of statistics courses.