Career
His primary interests are Software Testing and Analysis, Web Software Engineering, and Software evolution and Change-impact Analysis. He is the author of Introduction to Software Testing with Paul Ammann published by Cambridge University Press. He is the editor-in-chief of Software Testing, Verification and Reliability with Robert M. Hierons.
He also helped create the Institute of Electrical and Electronics Engineers International Conference on Software Testing, Verification, and Reliability and was the first Chair of its Steering Committee. is known for many fundamental contributions to the field of software testing, in particular mutation testing, model-based testing, and automatic test data generation.
Doctor received his undergraduate degree in Mathematics and Data Processing in 1982 (double major) from Morehead State University, and Master"s (1985) and Doctor of Philosophy (1988) in Computer Science from the Georgia Institute of Technology. He was on the faculty of Clemson University before joining George Mason in 1992.