Glenn is on the faculty of Louisiana State University where he teaches internal auditing in the Center for Internal Auditing. Prior to receiving his DBA at the University of Tennessee , he received a BS and MA from the University of Alabama .

Professor Sumners has over ten years professional experience in industry, consulting, and public accounting. This experience includes three years as the Controller of ESP.

Professor Sumners has authored two IIA Monographs, "Developing the Internal Auditor's Leadership Skills" and "Conducting Internal Audit Interviews." In addition, he has authored articles in Managerial Auditing Journal, Auditing: A journal of Practice and theory, Internal Auditing, Internal Auditor and others. He serves on the Internal Auditor Editorial Advisory Board, AHIA New Perspectives Editorial Committee, the Managerial Auditing Journal Editorial Team, and the editorial team of the International Journal of Auditing. He serves on the EDPACS Editorial Board and the CAE Bulletin Review Team.

He is the Director of the Louisiana State University Center for Internal Auditing. He was named Educator - of - the - Year in 1987 by the IIA and received the LCPA Lifetime Achievement in Accounting Education Award in 1999. In 2006 he received the Bradford Cadmus Award. Fifteen students from the LSUCIA Program have won the international award for the highest score on the CIA exam. In 2002 an LSUCIA student received the CIA "Gold Medal". He received the 2001 CIA Academic Outreach International Award. In 2003 the LSUCIA received the AHIA Institution Award. He currently serves as the IIA's Consulting Professor for Academic Relations.

In the last 20 years, Professor Sumners had made over 1100 presentations to companies, organizations, and IIA Chapters. This list includes numerous CIA exam reviews. In addition, he provides quality assurance and consulting services to internal audit departments and audit committees.