Mr. Revell is the founder and President of Revell Group International, Inc., a global business and security-consulting firm, based in Rowlett, Dallas County, Texas. He also serves as Chairman of Imagis Technologies, Inc.; a software company focused on security, intelligence and law enforcement, incorporating facial recognition biometrics and database integration.

Mr. Revell was born in Muskogee, Oklahoma, attended the University of Georgia and East Tennessee State University, receiving a B.Sc. degree in 1960; he received a Master's degree in Public Administration from Temple University in 1972. He completed executive programs at the Federal Executive Institute; the Kennedy School of Government, Harvard University; and the National Executive Institute, FBI Academy, as well as the Program for Senior Executives in National and International Security, Kennedy School, Harvard University in 1989. In June 1960, Mr. Revell was commissioned a Lieutenant in the U.S. Marine Corps and served four and one‑half years as an aviator.  He left active duty in November 1964, as a Captain.

On November 16, 1964, Mr. Revell was appointed a Special Agent of the FBI.  He served in the Kansas City, Philadelphia and Tampa Divisions and at FBI Headquarters (FBIHQ) in the Organized Crime Section, the Inspection Division, and the Office of Planning and Evaluation.  In January 1975, Mr. Revell was promoted to Assistant Special Agent in Charge of the Chicago Division, and later served as Acting Special Agent in Charge. In October 1976, Mr. Revell was promoted to Senior Executive Service (SES) rank and designated Inspector, Executive Assistant to the Associate Director at FBIHQ.  In November 1977, he was designated Special Agent in Charge of the Oklahoma Division.  In August 1979, Mr. Revell was designated Deputy Assistant Director, Criminal Investigative Division, FBIHQ, where he directed the FBI's programs in Organized Crime, White Collar Crime, Official Corruption and Undercover Operations.  In June 1980, he was promoted to Assistant Director and placed in charge of the Criminal Investigative Division, making him responsible for the criminal investigative and counter-terrorism programs and operations of the FBI.  In January 1981, Assistant Director Revell was placed in charge of the Administrative Services Division where he was responsible for Personnel, Budget, Finance, and Physical and Personnel Security Operations of the FBI.

In May of 1982, Mr. Revell was again placed in charge of the Criminal Investigative Division and given the additional responsibility for planning and implementing the FBI's newly acquired drug enforcement jurisdiction.  In July 1985, Mr. Revell was promoted to Executive Assistant Director‑Investigations (SES-6) the highest rank in career Government service. He served as the Director's deputy in charge of the FBI’s Criminal Investigative, Counter-Terrorism and Counter‑Intelligence programs. He was also responsible for international investigative and liaison activities of the Bureau, including its Legal Attaché and INTERPOL operations.  In July 1989, his title was changed to Associate Deputy Director - Investigations and oversight of the Training and Laboratory Divisions of the FBI were added to his responsibilities.

As a member (1982‑1991) of the President's Council on Integrity and Efficiency, he was Chairman of the Council's Committee on Integrity and Law Enforcement.  He was a member of the Attorney General's Economic Crime Council and served as Chairman, INTERPOL Conference on International Financial Crime, Cannes, France, in 1983.  He was a member of the National Foreign Intelligence Board, as well as the Terrorist Crisis Management Committee and the Deputies Committee of the National Security Council, and the White House Oversight Working Group on Narcotics. He served as Vice Chairman of the Interagency Group for Counterintelligence.  In 1985 he served as a member of the Senior Review Group of the Vice President's Task Force on Terrorism. He served as a U.S. delegate to the United Nations International Conference on Drug Abuse and Illicit Trafficking, Vienna, Austria, June 1987.  Mr. Revell was a member of the Senior Policy Group of the Vice President’s Task Force on Border Control Issues in 1988; he also served as an Advisor to the President’s Commission on Aviation Security and Terrorism in 1989. He was a member of "The Executive Session on Policing", Kennedy School of Government, Harvard University, 1987‑1991.

In September 1987, Mr. Revell was placed in charge of a joint FBI/CIA/U.S. military operation (Operation Goldenrod), which led to the first apprehension overseas of an international terrorist.  President Reagan commended him for his leadership of this endeavor.  In 1989, President Bush awarded Mr. Revell the Presidential Rank Award of "Distinguished Senior Executive" and in 1990 the President conferred upon Mr. Revell the "Meritorious Senior Executive" award. In April of 1991 Mr. Revell received a Commendation from Dick Cheney, the Secretary of Defense, for his significant contributions to the National Defense, including the Desert Storm Campaign. In May of 1991 he was awarded "The FBI Medal for Meritorious Achievement", and in June 1991 he was awarded the “National Intelligence Distinguished Service Medal” by the Director of Central Intelligence, William H. Webster.

On May 28, 1991, Mr. Revell assumed the position of Special Agent in Charge, Dallas Division (covering the northern half of Texas).  On May 1, 1992, the Attorney General of the United States ordered Mr. Revell to Los Angeles, California and placed him in command of joint Federal law enforcement efforts to suppress the riots and civil disorder.  He was also assigned responsibility to coordinate the law enforcement activities of military forces assigned to combat the riots in Los Angeles. Attorney General William Barr presented Mr. Revell the Attorney General’s "Special Commendation Award" for "outstanding leadership in overseeing Federal law enforcement agencies response to the civil disorder in Los Angeles, California".  He retired from the Federal Bureau of Investigation on August 31, 1994 with the rank of Associate Deputy Director. In October of 1994, Mr. Revell was awarded the "Albert J. Wood Public Affairs Award" by the Middle East Forum "for his efforts in the fight against International Terrorism".

During his career as a FBI Official and subsequently as an International Security Consultant Mr. Revell has authored numerous articles on Terrorism, Counter-Intelligence and Organized Crime. He has spoken and lectured at the National and International level on these and other Criminal Justice and National Security subjects on a frequent basis. He served as an advisor on International Organized Crime to the National Security Council in 1996, and as a consultant to the President’s Commission on Critical Infrastructure Protection in 1997.

From 1999 to 2003, he was President of the Law Enforcement Television Network (LETN); a nation-wide training, information, education, news satellite system for law enforcement, located in Carrollton, Texas; as well as being a member of the Executive Assessment Panel, Law Enforcement Technology and Policy, National Institute of Justice, Washington, D.C.

In 1998 he was Co-Chairman, Threat Assessment Group, Task Force on Department of Defense Responses to Transnational Threats, Washington, D.C.

He has been interviewed or served as a Commentator on numerous National and International television news and commentary programs; such as "60 Minutes", "Face the Nation", "Nightline", “Dateline”, and various CNN programs. He is a frequent commentator for National Public Radio, NPR and the Fox News Network, CNBC, MSNBC, Court TV, the British BBC, the Japanese NHK, and the Canadian Broadcast Company, CBC.

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In addition to his consulting activities on International security matters, Mr. Revell has authored a book chronicling his experience in the FBI, from the Kennedy assassination to the Oklahoma City Bombing, which has been published by Simon and Schuster/Pocket Books.  In this book, A G-man’s Journal, Mr. Revell provides an insider’s prospective on significant events that have affected the history of our country from the vantage point of a "participant/observer" who rose through the ranks to the Bureau’s second highest position.