Partnering with Enterprise & Scale-ups | Hands-on Advisory • Technical Reviews • Fractional CISO

Piotr Zenon ŻabrowskiEnterprise Security Advisor | Cloud & SI Security Architect | Security Leader

I design human-centric cybersecurity programs that protect data and people without creating friction. My expertise spans hybrid-cloud and AI security, helping organizations build resilient, compliant, and user-friendly security architectures. I’ve led security transformations for Europe’s largest e-commerce platforms and now partner with organisations through B2B advisory, hands-on architecture reviews, and strategic roles.

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Experience

Each role includes queryable SI context—ask the SI for the real story behind the bullet points.

Security Architects

Principal Security Expert (Client: Global Tier-1 Financial Holding)

2024-12-02 – Present

B2B Advisory & Availability: Operating an independent security consultancy primarily dedicated to a long-term enterprise engagement, with bandwidth available for select advisory projects, security audits, and architecture consultations.
Hybrid-Cloud Security: Led comprehensive security assessments across hybrid-cloud infrastructure for a global financial institution, identifying critical vulnerabilities and reducing attack surfaces.
Governance & Process Redesign: Directed a comprehensive review and redesign of security process documentation to streamline compliance and operational efficiency.
Stakeholder Alignment: Designed and conducted an internal customer satisfaction and expectations survey to align the Cloud Security department’s services with business and engineering needs.
Technical Hiring & Vetting: Partnered with leadership to scale cybersecurity and cloud teams—designing interview frameworks, assessing candidate capabilities, and driving hiring decisions.
AI & ML Security Architecture: Defined the architecture and security domain logic for AI decision engines and ML classifiers, directing development teams to automate routine operational cadences.

Centrum Projektów Polska Cyfrowa

Expert

2025-10-13 – 2025-12-12

Conducted comprehensive technical evaluations for the Digital Europe (DEP.01.01.01/25) cybersecurity grants program, assessing project feasibility, innovation, and alignment with strategic objectives to support funding decisions.

Allegro Group

IT Security Specialist → Regular to Senior

2022-06-01 – 2024-11-30

Implemented Cloud Security Posture Management (CSPM) for Azure, reducing misconfigurations.
Implemented cloud-based conditional access and multi-factor authentication.
Led cloud security work stream.
Created and implemented AI threat modeling and AI security policy.
Partnered with Procurement, Legal, Privacy, Engineering and business owners to integrate security requirements into the SaaS vendor onboarding process.
Contributed to improving the SaaS vendor onboarding workflow by introducing repeatable security assessment criteria, escalation paths and risk-based decision points.
Reviewed vendor integration architectures, data flows, identity and access models, security controls and third-party dependencies as part of SaaS onboarding.

Ceneo.pl

IT Security & Compliance Specialist → Regular to Senior

2019-09-02 – 2022-05-31

Built the company’s first security incident response program, reducing breach resolution time.
Achieved full NIST CSF and GDPR compliance, avoiding potential fines.
Builded company security policy

Polish Armed Forces

Soldier

2019-08-01 – 2022-04-30

Served in cryptology and cybersecurity corps

Skills

An honest snapshot—not a keyword dump.

STRONG

AI Security
Cloud Security
OSINT
Statistical Analysis
Threat Modeling
Vibe coding
Vulnerability Scaning

MODERATE

Flipper Zero/Hardware Hacking
IoT Security
Mobile Security (Android)
PowerShell Scripting

GAPS

CI/CD security
Programming
AWS

The SI Layer

Everything here is SI-queryable. Bullets have context. Claims have evidence. Bring your hardest questions.

Will I Fit? An Honest Answer

Paste a job description. Get an honest SI assessment of whether I'm the right person—including when I'm not.

What People Say

Recommendations from colleagues and collaborators.

"I had the pleasure of working with Piotr over the past few years in various capacities—both as a one-man army, when he was responsible for IT security at Ceneo, and as an IT security expert at Allegro. Piotr possesses extensive knowledge in many areas and is always eager to share it, whether with members of the IT security team or within the entire IT department. Thank you, Piotr, for these years of collaboration, your support in numerous security investigations, and the excellent cybersecurity training sessions—especially in OSINT. I also greatly appreciate your insights into security in public clouds and LLM/AI, to name just a few highlights. Wishing you the best of luck in your future endeavors!"

Jarosław Pukacki

Senior IT Security Specialist, Allegro.pl

"Together with my team, I had an opportunity to collaborate with Piotr on multiple initiatives related to the MLOps platform. Piotr is a great security specialist, having an extensive and up to date domain knowledge. Openness for a discussion, grasping the wide perspective and willingness to help and support are surely his advantages."

Artur Nowosielski

Manager, Machine Learning, Allegro.pl

"Piotr, in addition to possessing extensive knowledge and experience, willingly shares it on internal and external forums. We had the opportunity to collaborate multiple times in knowledge-sharing initiatives and employer branding activities. Each time, Piotr demonstrated initiative, paid careful attention to the form and content of his presentations, sought improvements in this area, and honed his skills. He is undoubtedly a popularizer of security topics in his industry and beyond, an excellent speaker, and a committed colleague. Piotr is also one of those individuals who can professionally and consciously represent the company in public forums."

Teresa Bęben-Bubik

Employer Brand Manager, Allegro

"I highly recommend Piotr as an exceptional IT Security specialist. He possesses extensive knowledge in his field, combined with strong analytical skills that enable him to make quick, accurate decisions. Piotr is dedicated to identifying security risks and resolving them effectively, working collaboratively with others. His supportive attitude is a valuable asset to any team. Piotr is absolutely worth of recommendation."

Przemysław Zadoń

Manager, IT Services, Allegro.pl

"During my time at Allegro, I've had the opportunity to work with Piotr, who was our liason to our company's SEC team. Piotr helped establish and enforce a clear security strategy for our Azure-based products, which led to global increases in our subscriptions' secure-scores. In addition we always knew we could depend on his support, when facing a security-related challenge. All things considered, I'd be very happy to work with him again, and wish him best of luck in the future"

Maciej Misztal

Platform Architect, Microsoft MVP, Allegro.pl

"I highly recommend this Allegro expert! In our team, we could always rely on him—whether for quick reactions to unexpected situations or daily support. He knows the topic inside out and can find a solution where others would give up. Working with him means peace of mind about security and certainty that everything is under control. I recommend him to anyone looking for someone with extensive knowledge and a great approach to work!"

Paweł Sobotka

Senior IT Security Specialist, Allegro.pl

"Definitely recommended! Piotr is a reliable and insanely knowledgeable expert with great communication skills and work ethic."

Miłosz Piasecki

Cyber Security Engineer, Allegro.pl

"I have had the opportunity to work with Piotr on a number of occasions and have always been impressed by his wide-ranging, off-the-charts knowledge. One of the qualities that I particularly appreciate in Piotr is his inquisitiveness and thoroughness - Piotr never "lets go" and sees every matter through to the end. In addition, it is worth noting that Piotr is good to listen to and one of the most interesting training sessions (about OSINT) I have had the opportunity to attend was his own training. I sincerely recommend working with Piotr!"

Michał Krzyżan

Senior Information Security Specialist , Allegro.pl

"Piotr can navigate even the most seemingly hopeless situations and find a way out of them. He pokes holes in everything, plays devil's advocate by asking tough but justified questions that have more than once revealed new perspectives or clever solutions. He always sees tasks through to completion. He can explain the intricacies of IT or security in an understandable way. Moreover, he is collegial and reliable. I'm glad I had the pleasure of working with Piotr on several projects."

Katarzyna Tadajewska

Legal counsellor / Manager, Ceneo.pl

Fun & stuff

Casual distractions. Nothing résumé-worthy, just here if you need a break.

Browser game

Terminal Quest

A quick browser text-adventure with security-themed bosses. Good for a coffee break. It extinguishes enthusiasm like the best fire extinguisher.

WASM port

Angband

The classic roguelike running in the browser. Existing open-source port, no wizardry required.

Micro-service

NaaS — No as a Service

Politely Refusing a Request: A Thousand Reasons Why the Answer Is "No."

Clone it from GitHub

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