Cyber Security District

Cyber Security District
  • 5.0 (2)
  • CAREERS
  • UPDATED BIWEEKLY

The interview podcast for cyber security professionals and for those who aspire to become one. We interview industry experts to get to know the latest trends, real life war stories and everything you need to know about this exciting industry.

  1. APR 28

    Building Human Resilience for Deepfake-Driven Phishing | Julius Muth | Cyber Security District Podcast

    In this episode of Cyber Security District, we sit down with Julius Muth, co-founder of Revel8, a fast-growing startup tackling one of the most urgent threats in modern cybersecurity: deepfake-powered social engineering. Julius flew in from Berlin to join us in the Amsterdam studio and breaks down how attackers are already cloning voices, abusing call centers, and using multi-channel manipulation (email, WhatsApp, LinkedIn, video calls) to bypass technical defenses and target employees at scale. We also get into how Revel8 scaled from early MVPs to large enterprise rollouts, the team’s operator DNA from Celonis, and their goal to build “10 million human firewalls.” In this episode, we dive into: Why deepfake voice phishing is exploding via service desks and call centers The real-world deepfake fraud case that changed everything (25M USD) How Revel8 personalizes awareness with role-based “playlist” simulations Why time-to-first-report beats click rate as a security KPI How Revel8 scaled fast: funding, enterprise rollouts, and culture Key Takeaways: Deepfakes turn trust signals (voice, video) into attack surfaces Context-rich phishing is far more effective than generic campaigns Awareness works best in short, relevant, continuous moments Measure reporting behavior and speed, not “gotcha” click rates Modern threats require modern training across every channel Timestamps: 00:00 – Introduction 00:15 – Meet Julius Muth and Revel8’s mission 01:20 – Why deepfakes are a serious enterprise risk 02:30 – Voice phishing through service desks and call centers 04:00 – A real incident example and why it’s “hot” right now 04:45 – Founders’ background and the Celonis operator mindset 05:40 – Validating the market (100 handwritten letters) 07:10 – The deepfake fraud case: 25M USD and what it proved 09:20 – Social engineering is leveling up (multi-channel trust) 12:00 – The “podcast vote” scam and impersonation patterns 14:20 – From MVPs to enterprise: what changed after hiring a senior CTO 19:00 – Why traditional awareness training fails 23:40 – The “Spotify playlist” model: personalized learning journeys 26:00 – Turning real attacks into simulations 28:40 – Better KPIs: time-to-first-report and workforce sensors 31:10 – Modern payloads and “make the victim execute” tactics 34:40 – Scaling growth: team, cold-calling “Champions League,” and GTM 41:40 – Advisors, credibility, and enterprise access 45:00 – The goal of “10 million human firewalls” 46:10 – Why the name Revel8 (and the naming story) 48:40 – Hiring profile and what they look for 51:40 – Munich office move and what’s next 52:35 – Final message to CISOs Connect with the guest: Julius Muth: https://www.linkedin.com/in/julius-muth/ Revel8: https://www.revel8.ai/ Follow Cyber Security District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    54 min

  2. APR 14

    Securing the World´s biggest HR Firm | Martijn Nykerk, CISO at Randstad | Cyber Security District

    Title: Securing the World´s biggest HR Firm | Martijn Nykerk, CISO at Randstad | Cyber Security District Episode Description: What does it take to secure a company that manages the careers of millions of people across the globe? In this episode of Cyber Security District, we sit down with Martijn Nykerk, CISO at Randstad, one of the world’s largest HR and recruitment firms, with over 6,000 branches across 38 countries. Martijn has spent 20 years inside Randstad, growing from running the Dutch telco infrastructure to becoming its first global CISO, building security from the ground up as the company transformed from a federation of local operators into a true multinational. With an engineering background forged on North Sea gas platforms, Martijn brings a rare perspective to the CISO role: the ability to zoom in and out across technical, process, organizational, and business layers simultaneously. In this conversation, he breaks down what that actually looks like in practice, why social skills matter more than most security professionals think and how to build a security function that people want to work with.  In this episode, we explore: How Martijn’s career started on a North Sea gas production platform  and why safety systems are the original cybersecurity What it took to build Randstad’s first global security function from scratch The CISO dilemma: centralize or embed?  How to build a security team people actually want to engage with Managing vulnerability backlogs, budget battles, and the patching problem The real-world incident that moved cybersecurity from priority 43 to priority 1 overnight How AI is lowering the barrier for attackers  including 16-year-olds running perfect phishing campaigns Why CISO community-building and information sharing matter more than ever Timestamps: (00:00) – Introduction (01:15) – Starting on a North Sea gas platform (05:30) – Joining Randstad and running the Dutch telco infrastructure (09:00) – Becoming Randstad’s first global CISO (14:20) – The “zoom in and zoom out” CISO mindset (19:45) – What would surprise someone shadowing a CISO for a week (24:10) – Compliance-heavy vs. risk-driven CISO profiles (28:30) – Embed vs. centralize: the security team structure debate (33:00) – How to make security a team people want (37:15) – Patching, vulnerability backlogs, and the budget war (42:30) – Building a security narrative that lands with leadership (46:00) – The incident that changed everything: data breach and crisis response (53:20) – What makes a great security professional (hint: it’s social skills) (58:00) – The CISO hiring interview: starting with “What questions do you have for me?” (01:02:10) – Community building and the 80% overlap problem (01:07:30) – AI as an attacker accelerant  (01:12:00) – Final message to CISOs: trust each other and share more   Connect with the guest: Martijn Nykerk: https://www.linkedin.com/in/martijnnykerk/   Follow Cyber Security District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    59 min

  3. MAR 31

    From Fintech Founder to Cyber Investor with Chris Zadeh | Cyber Security District

    In this episode of Cyber Security District, we speak with Chris Zadeh, serial entrepreneur, fintech pioneer, angel investor, and author. Chris was founder and CEO of Ohpen, one of the first cloud-native core banking platforms in Europe, orchestrating more than €100 billion in financial flows. After building and scaling Ohpen for ten years, he exited and shifted his focus to investing, launching a dedicated cybersecurity fund and his own investment vehicle. From growing up without financial privilege to becoming one of the early digital banking pioneers at Binck in the Netherlands, Chris shares an unfiltered look at execution, obsession, discipline, and what it truly takes to win in regulated markets. Now Chris is investing in cybersecurity startups, Chris explains what he looks for in founders, why AI is reshaping risk and compliance, and why Europe must rethink digital sovereignty. In this episode, we cover: Chris’ founder journey: from Binck Bank scale-up years to building Ohpen for 10 years What “security-first” looks like in fintech, non-negotiables, resilience, and trust with enterprise buyers Execution culture, exceeding expectations, hiring for discipline, and why culture beats product The shift to investing and why he started a cyber fund and what he looks for in founders What’s next in AI-driven risk, compliance + security convergence, and Europe’s digital sovereignty challenge Timestamps: 00:00 – Intro 00:14 – Meet Chris Zadeh 01:59 – Growing up without financial safety nets 03:14 – Joining BinckBank at 23 06:52 – Scaling to market dominance 08:57 – Wanting to sit at the decision-making table 11:36 – Early infrastructure and security lessons 14:18 – A firewall shutdown incident 17:55 – Leaving to build Open 18:48 – The vision for cloud-native core banking 22:29 – 744 pages of rejection before first contract 27:14 – Migrating €15B live 28:09 – Security as non-negotiable 32:15 – Hiring discipline and execution mindset 35:05 – Culture: exceed expectations or leave 37:35 – The cost of extreme execution 41:21 – Transitioning to investing 44:27 – Why he rejects the “solo entrepreneur” myth 49:35 – Launching the cybersecurity fund 51:16 – AI, compliance, and new cyber opportunities 58:55 – European cloud sovereignty 01:04:03 – Signal message to CSOs: stay curious 01:06:00 – Outro Connect with the guest: Chris Zadeh: https://www.linkedin.com/in/chriszadeh/ Dark Red (Cyber Fund): https://www.darkred.at/ Follow Cyber Security District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    1h 6m

  4. MAR 17

    From 3x CISO to Founder: Building the Tool She Always Needed | Jaya Baloo Founder of AISLE™

    What if the real cybersecurity crisis isn’t attackers, but our own backlog? In this episode of Cyber Security District, we sit down with Jaya Baloo, former CISO at major global organizations including KPN, Avast, and Rapid7 and now founder of AISLE™, an AI-native platform designed to not just detect vulnerabilities, but fix them. After years defending complex enterprises from relentless threats, Jaya made a bold move: stepping out of the CISO seat to build the kind of technology she wished she had. Her mission is clear, eliminate the massive vulnerability backlog that leaves organizations trapped in “security theater” instead of meaningfully reducing risk. This conversation goes beyond buzzwords. We unpack why detection without remediation is broken, how AI can be applied responsibly to actually close security gaps, and what it takes to build transformative security products in stealth.   In this episode, we explore: Why Jaya left top-tier CISO roles to start AISLE™ The uncomfortable truth about vulnerability backlogs and unpatched systems Why identity failures remain a systemic weakness How AISLE uses AI for detection, remediation, and verification The importance of stealth mode before going public What leadership looks like in an AI-driven cybersecurity era Key Takeaways: Vulnerability management without remediation is incomplete Security technical debt is evolving into a societal-level risk AI must be paired with verification and human oversight Innovation is essential to preserving true defence in depth The best CISOs stay curious and challenge their own assumptions Timestamps: 00:00 – Introduction 01:20 – Jaya’s transition from enterprise CISO to founder 05:45 – The vulnerability backlog problem 10:30 – Why identity failures remain systemic 16:40 – Building AISLE™: from concept to stealth 22:15 – AI for remediation, not just detection 29:50 – Verification, testing, and human-in-the-loop controls 36:10 – Working with design partners and open-source communities 42:35 – The AI shift in cybersecurity 48:20 – Leadership lessons from the CISO seat 54:10 – Final message to global CISOs Connect with the guest: Jaya Baloo: https://www.linkedin.com/in/jaya-baloo-558492/ Website: https://aisle.com/ Follow Cyber Security District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    1h 1m

  5. 12/10/2025

    The AI Deepfake Problem Is Worse Than You Think | Marco Ramilli | Cyber Security District

    In this episode of Cyber Security District podcast, we speak with Marco Ramilli, a cybersecurity visionaire, TEDx speaker, and founder of IdentifAI, a deepfake detection company working at the intersection of AI, trust, and digital identity. From writing early sandboxing papers to leading cyber defense teams and selling his previous startup to VirusTotal (Google), Marco has spent the last two decades safeguarding digital borders. At IdentifAI, he’s now taking on one of the biggest threats of the AI era: manipulated content. Whether it’s fake insurance claims, fraud in football scouting, or synthetic identities onboarding to banks, his platform uses AI to detect AI: verifying whether images, voices, or videos were generated by humans or machines. In this episode, Marco shares his founder story, why he believes the shift from deterministic to probabilistic computing will reshape cybersecurity, and how his latest startup scaled to enterprise use cases within a year. In this episode, we cover: Marco’s hacking origin story and first run-in with his university Researching malware and voting systems at UC Davis Founding his first cybersecurity company in Italy when the market wasn’t ready Bootstrapping a business through 3+ years of break-even before momentum hit Early ransomware response and reverse-engineering threats Getting acquired by Tinexta and integrating into VirusTotal Building IdentifAI to detect deepfakes using AI-powered forensics From onboarding fraud to football scouting scams,  real use cases The rise of “digital performers” and the ethics of synthetic content Why deterministic cybersecurity tools are no longer enough The philosophical shift security teams must make to handle probabilistic models Advice for scaling startups, hiring A-players, and letting go as a founder His signal message to CISOs: curiosity will save us Timestamps: 00:00 – Intro 00:14 – Meet Marco Ramilli 01:00 – Hacking the campus network (with a for loop!) 02:15 – Getting caught, and hired for cyber research 03:10 – Reverse engineering malware at UC Davis 04:30 – Cybersecurity in Italy: too early, too expensive 05:45 – Why compliance was seen as a cost 06:20 – Building a company just to be the “owner of his time” 07:00 – Early business struggles & staying focused 08:30 – Why saying “no” saved his startup 10:10 – On embracing failure and learning from loss 11:30 – Curiosity, discomfort, and moving to the U.S. 13:00 – Sleeping on floors and working without backup 14:00 – Founding Yoroi, growing from 4 to hundreds of employees 15:30 – The ransomware era and massive inbound traction 16:45 – Sandboxing: research, papers, and real-world applications 18:00 – Joining Google via acquisition 19:30 – Startup phases and letting go as a founder 21:00 – Hiring advice: don’t save money on great people 23:00 – Launching IdentifAI: how a fake Pope jacket sparked a real mission 25:00 – Building AI to detect AI: early model design 27:00 – From 80% to 96% accuracy in deepfake detection 28:00 – Why images are more dangerous than text 29:45 – The weaponization of synthetic media 31:20 – How IdentifAI detects voice, image, and video manipulation 32:45 – Use cases: banking KYC, insurance fraud, and football scouting 35:00 – API-first strategy and enterprise readiness 36:30 – “Digital Performers” and the ethics of representation 37:30 – Real-time meeting detection via agents 39:00 – Why probabilistic AI is changing the rules 40:00 – How cybersecurity must evolve to deal with uncertainty 43:20 – Deployment flexibility: on-prem or private cloud 46:20 – The philosophical challenge of non-deterministic systems 49:30 – Final message to CISOs: stay curious Connect with the guests: Marco Ramilli: https://www.linkedin.com/in/marcoramilli/ Website: https://identifai.net/ Follow Cybersecurity District: Laurens Jagt on LinkedIn: https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com/ All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    53 min

  6. 09/30/2025

    Rethinking Cybersecurity Architecture with Dawnguard’s CTO Kim van Lavieren

    In this episode of Cyber Security District, we sit down with Kim van Lavieren, co-founder and CTO of Dawnguard, a cybersecurity startup that raised millions in funding before registering a company or launching a product. Kim’s story is anything but ordinary, from leading Marines on no-sleep missions to building offensive hacking tools for the Dutch military, to managing massive security teams at Amazon in the U.S., his path combines discipline, vision, and deep technical mastery. Together with co-founder Madi Abdurazak, Kim is now on a mission to completely rethink how cybersecurity should be done, by starting not with alerts or vulnerabilities, but with architecture, policy, and real business risk. Dawnguard is building a platform that automates secure-by-design architecture using AI, aiming to replace an entire category of cloud security tools before most companies even realize there’s a better way. In this episode, we cover: What the Dutch Marine Corps taught Kim about discipline and decision-making How a military comms officer became a cybersecurity architect Building secure systems after discovering flaws in weapons room access Writing offensive tools for the cyber division of the Dutch Armed Forces Why cyber soldiers may be more impactful than boots on the ground Kim’s journey to Amazon and running third-party security at massive scale The mindset shift from “no” to “how” in security engineering The origin story behind Dawnguard and raising millions pre-product How Dawnguard is building a new category for architecture-led security Using AI to design, verify, deploy, and enforce security from day zero Advice for cybersecurity newcomers, and why the industry must rebrand How Dutch risk aversion is holding back innovation — and how to break through Timestamps: 00:00:00 – Intro 00:00:47 – Kim's Background: From Marines to Cybersecurity 00:03:29 – Training Under Extreme Pressure 00:06:28 – Becoming a Communications Officer & Discovering Security Gaps 00:08:18 – First Lines of Code at Age 10 00:10:19 – When Tech & Physical Endurance Collide 00:11:04 – Offensive Cyber Capabilities in the Military 00:14:22 – Why Cyber Soldiers Now Matter More Than Physical Ones 00:17:05 – Consulting, CISO Roles & Joining Amazon 00:18:49 – The Scale & Speed of Security at Amazon 00:21:00 – The Origin of Dawnguard 00:23:00 – Automating Architecture Compliance with AI 00:25:08 – Using Threat Intel & Policy as a Starting Point 00:28:02 – Building the Engine: 5 AIs and a Moonshot 00:30:46 – Meeting Madi & Finding the Perfect Co-Founder Match 00:33:29 – Raising Millions with No Product — and Building a Dream Team 00:36:37 – Rise Into Resilience: What the Dawnguard Slogan Really Means 00:38:08 – Rebranding Cyber: Why the Industry Needs a Makeover 00:39:44 – Advice for People Trying to Break Into Security 00:41:03 – Advice for Aspiring Cyber Entrepreneurs 00:44:42 – Certifications, Labs & Reality Checks 00:47:25 – Going Big Means Accepting Uncertainty 00:49:00 – The 5-Year Vision: Replace Entire Security Categories 00:50:30 – Final Signal Message to CISOs: Security Is Balance, Not Absolutes Connect with the guests: Kim van Lavieren: https://www.linkedin.com/in/kim-v-0645931b4/ Learn more about Dawnguard: https://dawnguard.ai/ Follow Cyber Security District: Laurens Jagt (Host): https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    55 min

  7. 09/16/2025

    The Google Security Gap Nobody Talks About with Florbs founders Niek Waarbroek and Tycho Klessens

    In this episode of Cyber Security District, we sit down with Niek Waarbroek (Founder & CTO) and Tycho Klessens (CEO) of Florbs, a Dutch startup transforming file security inside Google Workspace. What started as a simple set of admin scripts has evolved into a powerful SaaS platform, used by global enterprises to automate onboarding, offboarding, and prevent accidental (or malicious) data leaks. Niek shares how his frustrations with error-prone onboarding flows inspired him to build smarter tools, and how a lack of visibility into shared files became a real security threat for many organizations. After bootstrapping Florbs for three years, he crossed paths with Tycho, then a VC investor, who not only became the commercial co-founder, but helped raise €1 million to scale the team. Together, they discuss the power of building with product-led growth, how they’re scaling without wasting capital, and why real file security goes beyond Google’s default settings. They also explain why early-stage cybersecurity startups need more than funding, including focus, clarity, and the right partner chemistry. In this episode, we cover: The original problem Florbs set out to solve inside Google Workspace Why offboarding is one of the biggest overlooked security gaps How ex-employees still access company data without detection From custom scripts to a full-fledged SaaS product Product-led growth without a sales team or marketing budget Raising €1 million from angel investors and CISOs Going from solo founder to building a complementary co-founder team How they’re building safe, reversible file actions with real-time insights Expanding into AI-powered detection and cross-platform collaboration security Lessons learned transitioning from VC investor to cybersecurity CEO Whether you're a CISO, founder, or operator working in Google Workspace or building a startup yourself, this episode shows how automation and visibility can finally close one of the biggest blind spots in modern file security.   Timestamps: 00:00 – Intro 01:15 – What Inspired Florbs: The Google Workspace Problem 03:40 – Why Onboarding & Offboarding Create Risk 06:00 – Real-World Cases: Ex-Employees Accessing Confidential Docs 08:45 – Building from Admin Scripts to Full Product 11:30 – Why Google Alone Doesn’t Cut It for File Security 14:50 – The Origins of the Name “Florbs” 18:10 – Google Developer Expert Status & Product-Led Growth 21:00 – Meeting Tycho: From VC Investor to Co-Founder 25:30 – The First Pitch, the Missed Investment & The Unexpected Partnership 30:40 – Raising Smart Capital (Not Just Any Capital) 34:00 – Scaling Carefully: Where the €1M Will Go 37:20 – Building Automated Security Workflows 40:15 – Preventing AI-Fueled Phishing & Lookalike Domain Attacks 44:00 – Hiring Philosophy, Co-Founder Chemistry & Startup Reality 49:00 – Final Advice for Entrepreneurs & First-Time CISOs 52:30 – One Signal Message to CISOs: Don’t Block Everything   Connect with the guests: Niek Waarbroek: https://www.linkedin.com/in/niekwaarbroek/ Tycho Klessens:https://www.linkedin.com/in/tycho-klessens-a215abb7/ Learn more about Florbs: https://florbs.io Follow Cyber Security District: Laurens Jagt (Host): https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    47 min

  8. 09/03/2025

    Scaling AI-Powered Pentesting Globally with Breachlock CEO Seemant Sehgal | Cyber Security District

    In this episode of Cyber Security District, we sit down with Seemant Sehgal, founder and CEO of Breachlock, one of the fastest-growing offensive security companies in the world. Seemant’s journey took him from a small town in Northern India to leading global cybersecurity teams at ING Bank, before founding a startup that’s now active in over 20 countries. At Breachlock, Seemant is rethinking how offensive security is done. His platform combines automation, AI, and human-led red teaming to deliver scalable Pen Testing as a Service (PTaaS) that addresses the growing inefficiencies of traditional penetration testing. Seemant has built a globally distributed company operating in over 20 countries, while staying close to the ground truth of cyber operations and keeping his team deeply connected to the challenges that security teams face every day. In this episode, we cover: Building a global cyber career without a linear path Lessons from running cybersecurity at ING Bank The inefficiencies of traditional pen testing Starting BreachLock with automation and AI at the core Launching Adversarial Exposure Validation (AEV) Balancing AI and human expertise in offensive security Leading a remote team across 20+ countries Hiring for culture and alignment, not just skills How to sell cyber risk to non-technical stakeholders Message to all CISOs Whether you're scaling a security startup, running a blue team, or navigating board-level cyber strategy, this episode delivers hard-earned insights from someone who's seen the full lifecycle, technical, strategic, and entrepreneurial. Timestamps: 00:00 – Intro 01:10 – Growing Up in Northern India 03:25 – Starting Out in Ethical Hacking at IBM 06:10 – From Defense to Offense: Career at ING Bank 09:00 – Identifying the Pain Points of Traditional Pentesting 11:30 – Founding BreachLock: Automating What Matters 15:40 – What is Adversarial Exposure Validation (AEV)? 19:20 – Scaling with AI, But Keeping It Human 23:45 – Managing a Remote-First Global Team 26:30 – Hiring Philosophy: Look for Disagreement and Culture Fit 30:15 – Translating Cyber Risk for the C-Suite 33:00 – Staying Grounded: Lessons from Building Profitably 36:20 – Advice to Future Founders & Security Leaders 39:00 – Final Message to all CISO’s Connect with the guest: Seemant Sehgal: https://www.linkedin.com/in/s-sehgal/ Learn more about Breachlock: https://www.breachlock.com/ Follow Cyber Security District: Laurens Jagt (Host): https://www.linkedin.com/in/laurensjagt/ Website: https://www.cybersecuritydistrict.com All channels & newsletter: https://beacons.ai/cybersecuritydistrict

    54 min
See All (46)

Trailer

Ratings & Reviews

5
out of 5
2 Ratings

About

The interview podcast for cyber security professionals and for those who aspire to become one. We interview industry experts to get to know the latest trends, real life war stories and everything you need to know about this exciting industry.

Information

  • Creator
    Cyber Security District
  • Years Active
    2021 - 2026
  • Episodes
    46
  • Rating
    Clean
  • Copyright
    © Copyright 2024. All rights reserved.
  • Show Website
    Cyber Security District

You Might Also Like