President, owner and co-founder of the ROSS Agency, Inc.
In 1993, William O'Sullivan retired from the Illinois State Police at the rank of Colonel, following a 23 year career with that agency.
He began his law enforcement career in 1964 as a patrolman with the Chicago Police Department. In 1970, after a tour of duty with the United States Army, he was appointed among the first group of special agents for the newly formed Illinois Bureau of Investigation. Mr. O'Sullivan steadily advanced through the rank structure of the state police and was appointed to direct the agency's criminal investigative division in 1979. He subsequently served in the top command position of the Division of State Troopers and the Illinois State Police Academy
Mr. O'Sullivan was granted a Bachelor's degree in business management from Loyola University (Chicago) and a Master's degree in public administration from DePaul University.
As a veteran of the United States Army, 1st Lieutenant, O'Sullivan served as an intelligence officer with the 173rd Airborne Brigade in the Republic of South Vietnam. He was twice awarded the Bronze Star during his combat tour of duty. He is a graduate of the 129th Session of the FBI National Academy.
He has served in numerous executive leadership positions with national law enforcement organizations. He has served as a member of the Executive Board of the FBI's National Crime Information Center, a director of the Regional Training Center National Policy Board for DARE (Drug Abuse Resistance Education), and National Chairman for the Association of State Criminal Investigative Agencies. In 1988, he was elected to the Executive Board of the FBI National Academy Associates - an organization with global membership of 17,000 graduates. In 1996, he served as the president of the FBI National Academy Associates.