About Us
OIS Global is a boutique security consulting and risk management firm founded on three core principles: Integrity, Innovation, and Leadership. We believe that small, disciplined, highly trained teams are uniquely positioned to solve complex problems with precision. In today’s high-threat and rapidly evolving operating environments, clarity and capability matter more than scale.
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Our team’s experience is grounded in advanced intelligence tradecraft, counterterrorism and counterinsurgency operations, law enforcement, and special operations support. This background enables us to approach risk not as a theoretical exercise, but as an operational reality requiring deliberate planning, sound judgment, and disciplined execution. OIS Global maintains a trusted network of partners and subject matter experts, allowing us to scale and adapt to mission requirements while maintaining precision and discretion.
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OIS Global delivers specialized security and risk management solutions to clients operating both domestically and internationally. Our expertise lies in supporting mission-essential efforts in dynamic, high-consequence environments — including austere and complex locations where performance, discretion, and adaptability are critical.
We are built for environments where the margin for error is small and the stakes are high.
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Leadership
John McCartney is the Founder, President, and CEO of OIS Global. A former U.S. Army Infantry and Military Intelligence Officer, he served in operational and advisory roles in Iraq and contributed to U.S. Pacific Command’s Security Cooperation Program, strengthening partnerships across the Indo-Pacific.
After leaving active duty, he served in senior advisory and operational roles within the Department of Defense and the U.S. Intelligence Community, including assignments with the National Counterterrorism Center, National Geospatial-Intelligence Agency, and the Office of the Director of National Intelligence.
He holds a Master of Public Administration and is a Nationally Certified Paramedic.