Why openopen systems technologies? Open Systems Technologies (OST) Corporation is a technology solutions specializing in high-end security solutions for large-scale enterprises. We are experts in providing an extensive range of techniques and methodologies to support clients with best-of-breed solutions.Did you know open systems didnt know there was a problem? “A lot of times, [Open Systems] will tell us, ‘Hey, we fixed this.’ We didn't know there was a problem.” If you want to outmaneuver the most unexpected cyberattacks you have to be better than good. That’s why we’ve completely re-engineered the way networking and security work together.How do i contact osh customer service? Call 1-855-616-2662 or enter your zipcode to search. We operate with a simple mission: to enable you to do the things you love, the way you’ve always done them. It’s your story. Let us help you tell it, and let us help you live it. “I’m happy with OSH and I like how they operate.