RC
Ralph Castillo Cybersecurity & Global IT
Available for strategic roles
Contact for IT Support / SecOps Team Member
Veteran cybersecurity leadership

Cybersecurity Leader & Global IT Strategist

U.S. Coast Guard Veteran with 20+ years of IT leadership securing critical infrastructure and enterprise environments across the Americas.

• From Panama Canal to enterprise cloud — protection is the ultimate priority.
Experience
20+ years
IT leadership & cyber defense
Global Operations
3 continents
99.9% uptime for enterprise services
Cyber Outcomes
65% faster
Threat detection with Microsoft Sentinel & Defender
From securing global shipping lanes to protecting digital enterprise frontiers—a career built on the principle that protection is the ultimate priority. Gulf War veteran • U.S. Coast Guard
San Antonio, TX • Bilingual: English / Spanish (813) 564-3393 [email protected] RalphCastillo.com 📄 Download My CV (PDF)
IT Support / Trouble Shooting Leader Critical Thinking Microsoft Security Stack On-Prem / Hybrid / Multi-cloud Docker Containers Critical Infrastructure
Professional & military experience
Security • infrastructure • leadership
Security Consultant & Response Specialist
2021 – Present
Catapult Systems / Quisitive
Microsoft Sentinel Defender Suite Hybrid / Multi‑cloud Threat Hunting
  • Architect and implement comprehensive security frameworks for hybrid multi‑cloud environments using Microsoft Sentinel and the M365 Defender suite.
  • Conduct proactive threat hunting and continuous security monitoring across enterprise ecosystems.
  • Advise senior leadership on security optimization, risk mitigation, and regulatory compliance.
IT Infrastructure & Campus Support Specialist
2021 – 2023
IDEA Public Schools
K‑12 technology Endpoint management User support at scale
  • Managed the full technology lifecycle for educational campuses supporting thousands of users.
  • Engineered resilient support systems, significantly reducing system downtime.
  • Implemented security‑aware IT protocols to protect students, staff, and institutional data.
Global IT Infrastructure Manager
2012 – 2021
Frost S.A. • Panama
Global infrastructure VMware Cloud integration $2M+ budgets
  • Directed international infrastructure strategy across North, Central, and South America.
  • Led multinational IT teams to deliver enterprise services with 99.9% uptime SLAs.
  • Modernized data center operations via virtualization and cloud‑integration initiatives.
  • Managed a $2M+ infrastructure budget and global vendor relationships.
Security Systems Specialist
1997 – 2003
Panama Canal Commission (U.S. Government)
Critical infrastructure Anti‑terrorism systems Maritime security
  • Designed and implemented anti‑terrorism security systems for critical national infrastructure.
  • Developed organization‑wide security protocols protecting vital international shipping operations.
  • Coordinated with international agencies on maritime security initiatives.
Petty Officer | Maritime Security | Tactical Operations Specialist
1989 – 1997
U.S. Coast Guard • Operation Desert Storm Veteran
Port Security Unit Law Enforcement Detachment Team leadership
  • Trained in vessel boarding, search, and seizure procedures for high‑risk maritime environments.
  • Served as Security Team Leader coordinating protective details for high‑value maritime assets.
  • Awards include National Defense Service Medal and Coast Guard Bicentennial Unit Commendation Ribbon.