About
Liberty OHM
In 1989, Rob Thompson, CIH, CSP, founded Liberty Occupational Health Management in Tulsa, Oklahoma, after working in the Environmental, Health, and Safety industry for many years. Liberty OHM is committed to building a culture of environmental excellence for our clients. Our mission statement is behind everything we do: Because people are worth protecting.
At Liberty OHM, our Specialties include industrial hygiene monitoring, disaster and flood management, comprehensive asbestos and lead inspection, and safety program development. We provide experienced environmental consulting services all over the state of Oklahoma and throughout the United States.
Liberty OHM President Rob Thompson has over 30 years of industry experience and has achieved two of the highest certifications in the field. Over the years, our company has grown, and Rob has gathered a dedicated team of environmental health experts available night or day to solve any problem.

Our
Team

Creighton “Rob” Thompson, CIH, CSP, founded Liberty OHM in 1989 after working in the Occupational, Health & Safety industry many years. In 1975 he completed his Bachelor of Science degree in Biology & Chemistry from the Northeastern Oklahoma State University. In 1978, he completed his Master of Science in Occupational Health & Safety from the University of Oklahoma. He went on to successfully pass the Certified Industrial Hygienist (CIH) Comprehensive Practice Exam in 1983. He also received his Certified Safety Professional (CSP) certification in 1996. Rob has extensive experience in the oil/gas and utility industry and 40 years of experience in the Occupational, Health & Safety industry. He is responsible for making Liberty OHM what it is today. In his current role as President and Owner, he oversees all company projects and staff in conjunction with the EH&S Project Manager.
Licenses and Certifications
- Certified Industrial Hygienist (CIH)
- Certified Safety Professional (CSP)
- Oklahoma Licensed Asbestos Inspector
- Oklahoma Licensed Asbestos Project Designer
- Oklahoma Licensed Asbestos Management Planner
- Texas Licensed Mold Assessor
- Florida Licensed Mold Assessor
- OSHA 10-Hour Construction Training

Jake Williams, CHMM, GSP, B.S., graduated from the University of Central Oklahoma in 2014 with a Bachelor of Science in Industrial Safety. Jake has 6 years of experience of Environmental, Health and Safety in Construction, Manufacturing and University settings. Jake earned his Certified Hazardous Materials Manager credential from the Institute of Hazardous Material Management in November of 2019. Jake is currently studying for the Certified Safety Professional credential from the Board of Certified Safety Professionals. Jake’s specialty is in hazardous material management, hazardous waste management, and environmental compliance.
Licenses and Certifications
- Certified Hazardous Materials Manager (#24510)
- Board of Certified Safety Professionals Graduate Safety Practitioner (#GSP-10274)
- Oklahoma Licensed Asbestos Inspector (#402731)
- EPA’s RCRA Hazardous Waste Large Quantity Generator
- Department of Transportation Hazardous Material Employee
- 40 Hour HAZWOPER

Andy Chang is the Environmental Health & Safety Consultant at Liberty OHM. He has been in the Environmental Science & Safety field for over 11 years and continues to widen his professional experience. Andy is a graduate of Northeastern State University, where he received a Bachelor of Science in Environmental Science & Safety. After graduation, Andy continued in the environmental field, where he began his specialization in environmental consulting. He continued his love to learn and broaden his experience by designing professional facility sitemaps using AUTOCAD. Soon afterward, he became lead AUTOCAD designer and now has over 8 years of experience in designing personal facility sitemaps. Andy has natural fluency is both American English and Mandarin Chinese and is currently learning the Spanish language to widen his communication skills. His goal is to eventually receive a certification in Industrial Hygiene and a master’s degree in Environmental Science.
Licenses and Certifications
- OSHA Authorized General Industry 10 and 30 Hour Outreach Trainer
- Oklahoma Licensed Asbestos Inspector (#402367)
- OSHA 40 Hour HAZWOPER
- OSHA 10 Hour Construction
Why
Choose US

Quick Response Time
Over the past 25 years, we have successfully managed disasters and floods in sensitive environments where time is of the essence. We’ve also helped hundreds of companies that call in a panic when OSHA shows up, and we’ve helped establish safety protocols that save lives and protect companies from litigation along the road.

Available 24/7
We understand that your emergency situation can be critical to the ongoing operation of your business. We respond quickly to each situation and bring 30 years of Environmental, Health, and Safety experience to every job. Day or night, we’re there for you when you need us. We contract out to many companies that need us to be on standby for any emergency going forward.

Trusted Experts
Liberty Occupational Health Management provides consulting services for companies in Oklahoma and throughout the United States. Whether you need a written safety program created for your company, a flooded hospital cleaned up, or a meth lab cleaned up in an apartment complex, we’ve got it covered.