Cybersecurity operations · Architecture · Strategy
I am Philip Constantinou, a cybersecurity operations specialist, architect, and researcher based in Amsterdam. I design scalable security capabilities across cloud, detection and response, threat intelligence, vulnerability management, and emerging AI services.
Based in Amsterdam · Select independent engagements
Independent advisory work is delivered through Filsec.
Security operating architecture
Technical signals
Governance · Decision
Governed action Accountable defensive action01 / Perspective
They need clear ownership, sound architecture, trusted information flows, and operating models that convert technical signals into timely decisions.
My work sits between strategy and execution: understanding technical realities, designing the surrounding system, and helping teams operate it effectively.
02 / Expertise
I connect technical depth with the ownership, governance, and decision structures required at enterprise scale.
01
Designing security services, control models, information flows, and integration patterns for complex enterprise environments.
02
Translating technical risk into priorities, governance, roadmaps, and decisions that leaders and operational teams can act on.
03
Creating scalable operational structures that connect intelligence, detection, vulnerability management, response, and business decisions.
03 / Selected work
Selected work is presented in generalized form to protect confidential and operational information.
CTI-OPS
Threat intelligence often remains disconnected from operational controls, creating delays between identifying relevant threats and taking defensive action.
Designed the structure and architecture for a CTI-Ops capability connecting intelligence collection, analysis, decision criteria, ownership, and defensive control workflows.
Established a target operating model designed to reduce the path from validated intelligence to blocking action to less than one hour.
AI-SECOPS
Uncoordinated adoption of AI services can create data exposure, shadow AI, unclear ownership, inconsistent controls, and fragmented incident handling.
Designed an AI-SecOps framework that connects discovery, risk classification, approved usage patterns, monitoring, guardrails, and operational response.
Created a scalable model for enabling AI adoption while reducing unmanaged risk and organizational fragmentation.
VULNERABILITY MANAGEMENT
Vulnerability programs frequently struggle with duplicate findings, inconsistent ownership, unclear prioritization, and disconnected development and security workflows.
Streamlined vulnerability management structures across security operations and delivery teams by clarifying ownership, prioritization, information flows, and remediation workflows.
Improved the scalability and consistency of vulnerability management across complex environments.
04 / Experience
A career shaped across security operations, research, consulting, architecture, and service ownership.
View full experience on LinkedIn (opens an external website)Experience across
Organizations are listed as part of my professional history and do not imply endorsement of this website or Filsec.
05 / Writing & Research
I write about the operating models, governance structures, and emerging technologies shaping modern security programs.
Cyber Risk · Governance
An exploration of the structures required to translate technical security signals into consistent, accountable business decisions.
Read on Medium (opens an external website)AI Security · Operations
A practical look at discovering, governing, and securing unmanaged enterprise AI adoption.
Read on Medium (opens an external website)Automation · LLMs
An examination of where large language models can improve security workflows and where human oversight remains essential.
Read on Medium (opens an external website)06 / Independent practice
Filsec is my independent cybersecurity practice for focused engagements in security architecture, strategy, and operations design.
I work with organizations that need a clear operating model, an architectural perspective, or help translating security complexity into actionable decisions.
Security service architecture, capability design, control models, and integration patterns.
Capability roadmaps, governance structures, prioritization, and cyber risk translation.
Operating models, ownership structures, process design, runbooks, and security workflow improvement.
07 / About
I am a cybersecurity professional and software builder based in Amsterdam. I began in SOC operations, offensive security, and incident response before moving into security consulting, architecture, and enterprise security operations.
My work now focuses on the layer between technical systems and organizational decisions: designing capabilities, clarifying ownership, connecting teams, and creating structures that can operate at scale.
Alongside my primary role, I run Filsec for selected independent engagements. I also write about cybersecurity operations, AI security, automation, and cyber risk governance.
BSc Computer Science — Vrije Universiteit Amsterdam
Business Administration — Vrije Universiteit Amsterdam
Community involvement: StudSec, a cybersecurity association (opens an external website).
08 / Contact
For professional conversations, research collaboration, or a clearly scoped Filsec engagement, contact me directly.