A career prosecutor until entering private practice in 2004, Glen has distinguished himself in various areas of complex, white-collar crimes, primarily in the health care field.

After graduating from Baton Rouge's Broadmoor High School and receiving his undergraduate degree in Business Administration from Louisiana State University, Glen earned his law degree from LSU's Law School in 1977.

His interest in prosecution led him to an appointment as an Assistant Attorney General in that office's criminal division. Shortly thereafter Glen joined the staff of the Baton Rouge District Attorney's Office where he was lead prosecutor in almost 90 felony jury trials during a four-year career there.

In 1984, Louisiana's attorney general sought out and re-appointed Glen as an Assistant Attorney General in the state's Medicaid Fraud Control Unit, a prosecutorial unit charged with combating fraud committed against the state's Medicaid program, along with abuse and neglect of the elderly and infirm in the state's long-term care facilities.

Glen was appointed Director of the MFCU in 1987 and was instrumental in the passage of several bills in the state legislature that enhanced the group's ability to prosecute elderly abuse. For almost fifteen years, Glen was lead prosecutor in the prosecution of numerous health care providers who had cheated the state's Medicaid program. Under his leadership, Louisiana's MFCU was recognized by the U.S. Department of Health and Human Services as the nation's top unit in 1992.

Glen was extremely active in the National Association of Medicaid Fraud Control Units, serving on its executive committee and legislative committee for several years, and as its president in 1990. He was an instructor at the Federal Law Enforcement Training Academy in Glynco, Georgia on the topic of Medicaid Fraud and addressed various advocacy and professional groups within the state and across the country on the topic of health care fraud and patient abuse, most recently at the American Bar Association's Health Care Fraud Conference in Palm Springs, California, and including the ABA's 1997 Health Care Fraud Conference in Miami, Florida, the Healthcare Fraud and Abuse Symposium in Los Angeles, and the Health Care Fraud and Compliance Practices Conference in New York City. His work toward protecting the elderly earned him an appointment on the Governor's Committee for the Coordination of Police Services to the Elderly, and being recognized in 1996 by the Louisiana Association of Retarded Citizens (ARC) as a special advocate for that group. During this same time, Glen was a Special Assistant United States Attorney for both the Middle and Western Districts of Louisiana.

In 1998, Glen joined the United States Attorney's Office for the Middle District of Louisiana, continuing his prosecution of health care providers who defraud government programs, including Medicare. He remained with that office until joining former colleagues Michael Reese Davis and L.J. Hymel in 2004 in the private practice of law.