Elroi | Portfolio

About

I'm a Senior Security Architect focused on AI & emerging technologies, leading cyber security innovation around the duality of security for AI and AI for security. I specialize in AI governance, threat intelligence, fraud prevention, and post-quantum cryptography, aligning security, product, business, and data science workstreams to drive resilient organizational agility.

CV & Experience

A brief snapshot of leadership roles at the intersection of AI security, threat intelligence, fraud prevention, and large-scale cyber defense.

Cyber Security Innovation Team Leader · Citi

May 2023 – Present

Lead a strategic cyber innovation team focused on AI security, threat intelligence, and fraud prevention across a global financial enterprise.
Drive collaboration between cybersecurity and data science teams to apply AI and advanced analytics to security use cases.
Design and execute proactive strategies for identifying and mitigating emerging cyber threats in a rapidly evolving landscape.
Spearhead GenAI upskilling and secure adoption initiatives across technical and business workstreams, shaping enterprise AI enablement and governance.

Senior Innovation Architect · Citi Security Innovation Center

September 2019 – May 2023

Architected and demonstrated disruptive security solutions in identity, mobile, and encryption domains for complex enterprise environments.
Led R&D efforts to identify, evaluate, and integrate cutting-edge technologies in collaboration with industry and academia.
Acted as both Product Manager and Development Manager to drive adoption of innovative security tools from concept to production.

Senior Incident Response Analyst · PayPal

March 2016 – July 2018

Orchestrated the end-to-end lifecycle of high-priority security incidents across global infrastructure, from triage through containment and remediation.
Performed deep-dive threat hunting and real-time monitoring to detect and neutralize emerging threats.
Built custom security tooling and automated workflows that transformed incident handling from manual processes into scalable, automated detection and response.
Conducted focused forensics and technical analysis to protect critical systems, networks, and applications.

Information Security Consultant & Earlier Roles

2004 – 2016

Implemented and integrated fraud detection platforms and web application firewalls for major financial institutions, including PCI-DSS oriented deployments.
Led teams across QA, support, and documentation for insider fraud and threat intelligence solutions.
Managed 24/7 network operations and global enterprise connectivity, building a strong foundation in large-scale network and infrastructure operations.

Skills

A blend of AI governance, cybersecurity architecture, and hands-on incident response, combined with product-minded leadership across innovation, R&D, and global operations.

AI Governance AI Security GenAI Enablement Cybersecurity Architecture Threat Intelligence Incident Response Fraud Prevention Cloud Security Mobile Security Security Product Management R&D Leadership Cross-Functional Stakeholder Management Network Operations PCI-DSS & WAF Fullstack Engineering Background

Projects

Showcase a few key projects. Each card can link out to GitHub or a live demo.

AlarmPal · Next-Gen Android Alarm

A playful, accountability-driven Android alarm clock that combines gentle wake-ups with smart defaults, sleep awareness, and social accountability so you actually get out of bed.

Tech: Kotlin, Jetpack Compose, Android, Room, Hilt

Source

FunversarialCV · CV Hardener for LLMs

An open-source, security-centric CV \"hardener\" that injects OWASP-aligned easter eggs, metadata watermarks, and adversarial layers to test and outsmart automated recruitment systems.

Tech: TypeScript, React/Frontend, HTML