John Warren
@johnwarren
Security and operations leader delivering faster incident resolution, stronger risk controls, and measurable incident cost reductions.
What I'm looking for
I’m a Security and operations leader with 11+ years of experience in Incident Management, Problem Management, and Risk Operations across global, compliance-driven environments. I’ve delivered measurable results—about a 50% reduction in major incidents, 75% faster resolution times, and a 25% decrease in breach-related costs—by modernizing processes and improving proactive threat detection.
I lead 24/7, follow-the-sun major incident response and partner cross-functionally to drive RCA, post-incident reviews, and long-term remediation. With deep observability and SIEM experience (Datadog, AppDynamics, Splunk, IBM QRadar, and more) and security automation using Python, PowerShell, Ansible, and Bash, I help teams align to HIPAA, NIST, PCI DSS, GDPR, Zero Trust, FISMA, and ISO 27001.
Experience
Work history, roles, and key accomplishments
Incident Manager
HireRight
Apr 2025 - Mar 2026 (11 months)
Expanded problem management responsibilities and drove a ~50% year-over-year reduction in S1/S2 incidents by redesigning the incident response model, including escalation paths, runbooks, and post-incident review cadences. Led 24/7 global major incident management and modernized observability (AppDynamics to Datadog) to improve monitoring coverage and reduce MTTD.
Risk Operations Analyst
TikTok US Data Security
Apr 2024 - Mar 2025 (11 months)
Led e-commerce risk assessments, achieving a 35% reduction in platform incidents by improving detection coverage for high-risk transaction patterns. Reduced MTTR by 30% through automated threat detection workflows and strengthened incident response playbooks and governance for blockchain and digital payment systems.
Risk Operations Associate
TikTok US Data Security
Dec 2023 - Apr 2024 (4 months)
Reduced fraud incidents by 45% by developing and deploying advanced risk scoring models for high-volume transaction review. Standardized global policy enforcement procedures and authored SOPs for regulated product categories, including counterfeit detection.
IT Service Desk Team Lead
Acadia Healthcare
Jun 2022 - Nov 2023 (1 year 5 months)
Oversaw IT service delivery for 40,000+ users in a HIPAA/NIST-regulated multi-site environment, maintaining consistent SLA achievement. Reduced incident resolution times by 88% after implementing Zero Trust architecture and led/mentored a distributed service desk team with benchmarks, escalation protocols, and quality review processes.
Service Desk Analyst II
Acadia Healthcare
Sep 2020 - Jun 2022 (1 year 9 months)
Managed HIPAA-compliant endpoint monitoring across 10,000+ devices, identifying and remediating vulnerabilities before escalation. Developed disaster recovery plans aligned with FISMA and ISO standards to support business continuity for critical systems.
Technical Project Coordinator
Black Box
Aug 2017 - Apr 2019 (1 year 8 months)
Managed enterprise IT security projects focused on achieving and maintaining PCI DSS compliance across client environments. Coordinated wireless network design and deployment initiatives to ensure on-time delivery and alignment with stakeholders.
Education
Degrees, certifications, and relevant coursework
Western Governors University
Master of Science, Cybersecurity and Information Assurance
Grade: GPA 3.95
Earned an M.S. in Cybersecurity and Information Assurance at Western Governors University in May 2024 (GPA 3.95).
Western Governors University
Bachelor of Science, Network Operations and Security
Grade: GPA 3.90
Earned a B.S. in Network Operations and Security at Western Governors University in Dec 2020 (GPA 3.90).
Tennessee College of Applied Technology
Associate of Science, IT Systems Coordinator / Computer Information Technology
Grade: GPA 3.85
Earned an A.S. in IT Systems Coordinator / Computer Information Technology at Tennessee College of Applied Technology in Apr 2018 (GPA 3.85).
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
Skills
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