Third Party It Security Auditing - 918.280.9637


Call on Harmon Security Group LLC. for all of your third party it security auditing needs. We are the preferred and trusted provider for third party it security auditing services in the Midwest.


CLEET Certified Security Guard Personnel Services

Harmon Security Group is a premium security service/systems provider, an expert in the field of third party it security auditing, applying collective experience from the security service and security technology industries into diverse 21st century third party it security auditing solutions. Harmon Security Group specializes in providing CLEET Certified armed/unarmed security officers for all industries and organizations.

Whether you're in an office building, chemical plant, college campus, bank, hospital or a gated community, you'll find Harmon Security Group LLC., on the scene and trained to secure your facilities. For over 20 years, The Harmon Group's managers have provided security protection for facilities such as the Thomas Gilcrease Museum, an asset larger than the Tulsa International Airport.

Company Information


Our corporate office is located 2135 S 130th E Ave. in Tulsa where we have recently expanded our CCTV operations and off-site monitoring capabilities. Harmon Security Group LLC. manages security for many high-rise commercial facilities, as well as large commercial and industrial facilities in and around Tulsa. (HSG) was incorporated in January of 2007 to manage security services for major facilities in eastern Oklahoma. HSG is recommended by ASIS and has an A rating with the BBB.

Company History

Roger A. Harmon was President and founder of Harmon Security Group LLC., he is currently retired. Roger is now a consultant for the Harmon Group. Mr. Harmon has vast experience in the security industry, he began his police career more than forty years ago, after a successful tour in the Vietnam War. Utilizing specialized explosives training received while in the U.S. Army, Roger was a founding member of the Tulsa Police Department's bomb disposal unit, his experience ranges from explosive mitigation to white collar crime and homicide investigation. Roger Harmon retired from the Tulsa Police Department in 1990 and served as the Director of Security for the Thomas Gilcrease Museum for 19 years. Roger is a graduate of Red Stone Arsenal and the FBI's white-collar crime academy, and he is a CPP (Certified Protection Professional, certification via ASIS (American Society for Industrial Security).

Call for a free consultation today 918.280.9637