Preferred & Trusted
Government and corporate entities trust Harmon Security Group LLC to manage security guard services for their facilities…

A+ BBB Rating

Client Satisfaction has been our Top Priority for over 25 years!

Top Rated Reviews

Local Security Guard Company Reviews through 3rd Party Screening

Repeat Clients

You know the job was done right when clients return!
We Are

Recognized as a preferred and trusted security guard service provider in Tulsa Oklahoma, and the central U.S.

For nearly twenty years, The Harmon Group’s managers directed security operations for Tulsa’s largest city asset, the Thomas Gilcrease Museum… An asset greater than Tulsa’s International Airport.

On Site Security Company

We protect major facilities including high-rise commercial buildings, manufacturing facilities, banks, industrial parks, construction sites, museums, municipal buildings, government facilities.

“Government and corporate entities trust Harmon Security Group LLC. to protect their facilities and personnel from categorical threat causalities. Harmon Security Group is a premium provider of security guard services dispatching CLEET Certified armed and unarmed security officers for all industries and organizations.

Value Added Customer Service

Every cost effective security solution we design and implement is custom tailored to the specific needs of each individual client. Enhanced security services may include trained and certified armed and unarmed security guards, patrol officers, modern video security camera and CCTV surveillance systems complete with monitoring services, integrated ingress and egress security management or access control systems, on-site security vehicles or security patrol units.

Security Officers

Harmon Security Group LLC, utilizes Harmon employees to perform all work, nothing is subcontracted and all security officers are fully trained to the highest standards. Harmon Security Group specializes in providing CLEET Certified armed/unarmed security officers for all industries and organizations.

We are experts at what we do.
Check out the video to know what we offer!


  • Access Control
  • CCTV Monitoring
  • Lobby Concierge
  • Visitor Screening


  • Hybrid Solutions
  • Patrol Officers
  • Remote Monitoring
  • 24-hour supervision


  • Vacant building patrol
  • Camera Monitoring
  • Crime Handling
  • Crime Prevention


  • Industrial Security Officers
  • Integrated Security Services
  • Guest or client escort service
  • Stationary security posts


  • Stealth Monitoring
  • Inventory Patrol Officers
  • Vandalism Prevention
  • Virtual Guard Services


  • Employee Protection
  • Inventory Protection
  • Plant Security Plans
  • Plant Security Audits
What our clients say about us
We have been very impressed with the way you guys handled the security last night. Misty, Cathy and your people were very professional and nice to deal with. After speaking with Mr. Harmon and with the service provided by your officers, great service was provided. Will recommend.

Kimberly J. - Stillwater

I never got the chance to say thanks for the services provided and your own personal presence during the assignment. Also, please pass on my sincere gratitude to each of the team who took part; they were first class. If we are ever passing through Tulsa again I will be in contact and if you ever want a recommendation for any other tours stopping in town, let me know.

Mark. - Sir Paul McCartney Entourage

All board members on our organizing committee have been very impressed with the professional attitude of your team. We could not have asked for a better company to help us with our security needs for the event. Having adequate security personnel has allowed organizers to focus their attention towards other planning aspects of the event.

Debbie L. - Tulsa

Management and security were great very helpful and able to secure additional staff very little notice.

George W. - Pryor OK


CLEET Licensing

Interviews are conducted every Thursday afternoon. Our job openings and security positions change frequently. If no positions are immediately showing you may reload this page. As positions become available you may choose a job title link from the available job list to begin our online application process. For information regarding CLEET certification, visit the CLEET Licensing site.

Work Schedules
Online access to work schedule and total hours worked.

Cups of Coffee

Happy Customers

Diverted Crimes

Patrols Made

Ok... We guessed at most of it but you can sorta get the idea!
Daniel Harmon

Daniel Harmon


Cathy Harmon

Cathy Harmon

Office Manager

Cody VanCamp

Cody VanCamp

Operations Manager

On Site



Oklahoma Alarm License #41891
Get in Touch

CALL 918-280-9637

8 + 2 =