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Core Capabilities
Security Risk Assessments
Identifying vulnerabilities and providing practical recommendations to strengthen organizational security.
Operational Security Planning
Supporting organizations preparing to operate in unfamiliar or high-risk environments.
Threat Intelligence & Analysis
Providing insight into emerging threats, geopolitical risk, and security environments.
Crisis & Incident Advisory
Helping leadership teams respond effectively during critical events.
Operational Medicine
Operational medical solutions for remote, austere, and complex environments.
Leadership Informed by Operational Experience
John B. McCartney
President and CEO
John McCartney is the founder of OIS Global, an advisory and operational firm focused on security, intelligence, risk, crisis response, and austere medicine.
An Iraq combat veteran, former military officer, intelligence professional, and experienced paramedic, John brings experience across military, national security, and emergency medical environments. He leads OIS Global’s efforts to develop practical capabilities that help organizations operate effectively in complex, high-risk, and uncertain conditions.
Who We Work With
Strategic Support Across Sectors
OIS Global supports organizations operating in environments where security, risk, and operational complexity intersect.
Global Corporations
Supporting businesses expanding into complex regions and emerging markets.
NGOs & Humanitarian Groups
Providing security and risk management for international non-governmental organizations.
Tech & Infrastructure
Securing critical assets and operations for technology and large-scale infrastructure firms.
Private Sector Firms
Managing operational uncertainty for companies in high-risk or volatile environments.
Government & Defense
Trusted partners for government agencies and defense-related security projects.
What Sets OIS Global Apart
Operational Experience
Our team brings real-world experience across military operations, intelligence, and emergency medicine.
Practical Risk Management
We focus on actionable recommendations rather than theoretical assessments.
Discretion and Trust
Security engagements require confidentiality, professionalism, and trust.
Adaptability
Every organization and operating environment is different. Our work is tailored to each client.
Navigate Risk with Confidence
Start the Conversation
If your organization is navigating security risk, operational uncertainty, or complex environments, we welcome a conversation about how OIS Global may be able to support your team.