Established in 1964, NTEA – The Association for the Work Truck Industry represents 2,100 companies that manufacture, distribute, install, sell and repair commercial trucks, truck bodies, truck equipment, trailers and accessories. Buyers of work trucks and the major commercial truck chassis manufacturers also belong to the Association.

NV5 Geospatial, powered by Quantum Spatial, is one of North America's largest geospatial services firms, providing geographic insights to the largest government and corporate organizations that need geospatial intelligence to mitigate risk, plan for growth, better manage resources, and advance scientific understanding. Quantum Spatial customers include state and federal government agencies, engineering and construction firms, and other companies.

O2X is the globally renowned Human Performance education company for Tactical Athletes. They provide Training for Tactical Athletes, Tactical Athlete Nutrition, Tactical Athlete Conditioning, Tactical Athlete Resilience Training, and Mental Performance for the Tactical Athlete.

Oakland Fire Department is the official fire fighting and safety incharges of Oakland. They provide various training and emergency rescue services.

Oceanid works closely with Fire, Sheriff, Search and Rescue organizations and manufacturers for ideas, prototype testing and product proofing of rescue boats and equitment.

Oceanside Fire Department's mission is to protect the lives and property of our community and the surrounding areas from fires, natural disasters, and hazardous materials incidents, to save lives by providing emergency medical services and to prevent fires through prevention and educational programs. They provide excellent and compassionate service in an atmosphere that encourages innovation, professional and personal development.

Odessa Fire Company is a fire and safety company that supports rescue missions and other fire protection operations in the Odessa region of the US State of Delaware.

Odyssey Fire Protection LLC was founded on the idea of incorporating old school principles and training techniques with technologically advanced methods and modern equipment. WThey constantly train employees on the latest code updates, safety practices, and learn cutting edge technologies and methodologies to stay on top of the industry.

Ohio Valley Sprinklers is a full-service contractor with decades of experience, we provide fire protection for industrial, commercial and residential buildings in projects of any scope. Based in Owensboro, Kentucky, Ohio Valley Sprinklers operates in the Midwestern United States, focusing on Western Kentucky, Southern Indiana and Southern Illinois regions.