Most Recommended Network Security Experts

Scott Altiparmak is a Senior Information Security Engineer with 8+ years of experience spanning identity and access management, email security, and cloud security, with a focus on building and automating enterprise security programs end to end. He is the creator of Threat Terminal, a live game-based research platform studying how humans detect phishing in the generative AI era, and maintains open-source tools including Enterprise-Zapp and Threat Intelligence Tarot. He serves as Director of Programming for the South Florida ISSA chapter and speaks regularly at industry and academic events including Tech Hub Pulse 2026, PBSC CyberWeek, and the PBSC Cybersecurity Symposium.

Cybersecurity Expert | Cyberwarfare Strategist | Founder, Centuria Labs Research With over 25 years of specialized experience, Giovanni Battista Caria is a prominent figure in the European cybersecurity landscape. As the head of Centuria Labs Research, he has dedicated his career to advanced research in digital crime prevention and the development of impenetrable defensive architectures. His work bridges the gap between technical innovation and strategic analysis, making him a sought-after speaker at major international forums, including the International Security & Digital Council. Literary Contribution & Strategic Insight Caria’s extensive research has culminated in a series of influential works that address the evolving nature of digital threats from both a technical and legal perspective: The Black Book of Cybersecurity (Il Libro Nero della Cybersecurity): A deep dive into the structural flaws of modern digital infrastructure and the methodologies of high-level cyber attacks. The Invisible Front (Cybersecurity & Cyberwarfare): Co-authored as a comprehensive guide to the convergence of law, technology, and national security, this work serves as a manual for understanding state-sponsored digital conflict. The Architects of Shadow (PsyOps & Information Warfare): An analytical exploration of psychological operations and social engineering, detailing how digital influence can compromise national stability and institutional trust. Innovation in Defensive Systems Throughout his two-decade-long career, Caria has focused on creating innovative defensive frameworks designed to be mathematically and structurally resilient. His approach at Centuria Labs emphasizes proactive threat hunting and the implementation of security layers that go beyond traditional firewalls, focusing instead on system-level integrity and zero-trust principles. Strategic Vision A recognized expert in the legal and technical facets of the GDPR and cyber-law, Caria integrates regulatory compliance with hard-core technical defense. His philosophy is rooted in the belief that true cybersecurity requires a holistic understanding of the "invisible front"—the space where software engineering, international law, and geopolitical interests collide. "Cyber defense is not a static wall, but a dynamic architecture of constant anticipation and research." — Giovanni Battista Caria

Cyber Security Consultant and Tech Enthusiast with 10+ years of experience helping businesses strengthen digital security, optimize technology strategies, and drive innovation across the Cyber Security, Business Consulting, Technology, and SaaS industries. Skilled in identifying security risks, implementing resilient solutions, and advising organizations on secure digital transformation initiatives. Passionate about emerging technologies, PKI, cloud security, SaaS ecosystems, and helping startups and enterprises build scalable, secure, and future-ready systems. Known for combining technical expertise with business insight to deliver practical solutions that enhance operational efficiency, compliance, and cybersecurity resilience.

David Santiago (@DavidSecurity) is a Certified Security Professional with over 15 years of operational experience in security management, risk assessment, and physical protection. A U.S. Marine Corps veteran, David’s background includes securing U.S. embassies abroad and leading campus-wide security operations at a State Department-sponsored international school in Tunis, Tunisia, during the Arab Spring. Today, David works as a security consultant helping physical security integrators, SaaS platforms, and risk management firms improve their content marketing, thought leadership, and client engagement strategies. He specializes in creating industry-specific content—such as case studies, technical guides, and white papers—that informs decision-makers and drives growth. Based in Orlando, Florida, David actively follows the latest trends in physical security. He advises clients, contributes to leading industry publications, and regularly participates in conferences as a writer and subject matter expert.

For over 20 years, I've been on the front lines of cybersecurity, working with global organisations to help them answer critical questions like: "How effective are our security measures against a cyber attack?" My passion is empowering companies to identify and fortify their attack surface. I help leadership teams evaluate their security stack's effectiveness and build actionable roadmaps. Some of the topics I cover are Enterprise cybersecurity and strategy, culture and how it impacts cyber resilience. Emerging attacks and attacker innovation in ransomware and increasingly AI security risks. This passion for sharing actionable knowledge is why I also started writing my blog. It's my way of sharing ideas and providing insights for enterprise security defenders and educate the wider community. In my day-to-day role at Pentera, I lead a team of talented security engineers. We partner with leading organisations who are ready to embrace change. As a speaker and mentor, I enjoy challenging the norms, introducing disruptive technologies, and sharing best practices to raise the bar.

Yaniv Peretz Senior Security Consultant | Counter-Terrorism Specialist | Founder, CTCB | Security Technology & Digital Transformation 1. Introduction Mr. Yaniv Peretz is a seasoned security consultant and counter-terrorism expert with over 25 years of international experience in threat and vulnerability assessment, physical-security design, and professional security education. His multidisciplinary background spans military service, diplomatic security, corporate leadership, and consulting, enabling him to provide strategic and operational solutions across complex, high-risk environments. Throughout his career, Mr. Peretz has advised governments, multinational corporations, critical infrastructure operators, and educational institutions across Asia, the Middle East, Europe, and Africa. His work bridges the gap between practical field security operations and structured educational frameworks, ensuring that training and certification programs are grounded in real-world expertise 2. Professional Experience • Founder & Chairman – Counter Terrorism Certification Board (CTCB) Oversees internationally recognized certifications, including the Certified Counter Terrorism Practitioner (CCTP), Certified Physical Security Consultant (CPSC), Certified Emergency Response Officer (CERO), Certified Intelligence Analyst (CITA), and Certified Terrorism Response Officer (TRO). These programs are aligned with ISO/IEC 17024 and serve as global benchmarks for professional competence in counter-terrorism and protective-security management. • Founder & Managing Director – Lorin Pte Ltd (Singapore) Leads consulting and design projects in physical-security engineering, outcome-based contracting, and digital transformation. The firm has conducted hundreds of Threat and Vulnerability Risk Assessments (TVRAs) and developed integrated command-center designs for corporate, industrial, and critical-infrastructure clients. • Head of Security – Oerlikon (Singapore, Shanghai & New York) Directed global security operations, export-control compliance, and corporate investigations. Implemented comprehensive risk frameworks and developed security training programs across three continents. • Security Attaché – Israeli Ministry of Foreign Affairs Served in multiple diplomatic postings (Singapore, Spain, Latvia, and Jordan) and was responsible for embassy protection, threat analysis, and emergency-response coordination with host-country authorities. • Special Forces Operator – Israel Defense Forces Acquired extensive operational experience in counter-terrorism, intelligence operations, and crisis response, forming the foundation of his professional expertise in threat management and training design. 3. Selected Training and Instruction Track Record Mr. Peretz has designed and delivered counter-terrorism and security training programs for government agencies, law enforcement bodies, corporate entities, and educational institutions around the world. Selected highlights include: Government and Law Enforcement • Singapore Police SWAT (STAR Unit): Counter-terrorism and tactical-response training. • Singapore Police Intelligence Division & Korea Police Force: Behavioral profiling, hostile reconnaissance detection, and operational-response procedures. • Singapore Customs & Immigration Authority: X-ray screening and IED awareness training for front-line officers. • Hong Kong Police: Security management and crisis coordination for operational leaders. • Israel Railways & Public Transport: Counter-terrorism preparedness training for transport security officers. • Papua New Guinea Airport Police: Screening operations and emergency-readiness training. Corporate and Financial Sector • United Overseas Bank (UOB): Security-awareness and insider-threat prevention workshops. • Singapore Stock Exchange (SGX): Security awareness training for corporate staff and command-center operators. • Banks and MNCs in Belgium: Counter-terrorism awareness and protective-security strategies. • Oil and Gas Companies (Indonesia): Corporate security and crisis-management training covering both physical and cyber threats. Aviation, Transport, and Infrastructure • Changi Airport Group (Singapore): Risk-based aviation-security and behavioral detection training. • Incheon International Airport (Korea): Command-and-control modernization and TVRA training. • Kenya Power Company: Security awareness and incident-management training for site officers. Education and Hospitality • International Schools Across the Asia-Pacific: Security-threat awareness and emergency-drill coordination for administrators and teaching staff. • Las Vegas, USA: Terrorism-awareness workshops for hotel and resort security managers. • Hotels in Singapore: Security and crisis-preparedness training for major hospitality brands, including Marina Mandarin, Hyatt, Hilton, and Shangri-La. 4. Selected Consulting and Security Design Projects Mr. Peretz has served as lead consultant and designer on numerous high-profile projects involving TVRA, system design, policy development, and command-center implementation. Notable engagements include: • Mumbai Nariman House (India): Post-attack security redesign following the 2008 Lashkar-e-Taiba terrorist incident. • Singapore Stock Exchange (SGX): Security master plan and digital transformation project, recognized for excellence in Video Analytics Implementation and Job Redesign. • Incheon International Airport (Korea): Security assessment and modernization of command-and-control systems. • Expo Astana (Kazakhstan): Security-concept development and operational training for international exhibitions. • Kenya Power (Kenya): Nationwide TVRAs and security master plan for 55 energy sites. • Big C Retail Group (Thailand): Risk assessments and training for retail-site management teams. • Eco-Tech@Sunview, JEM Mall, Bukit Timah Plaza (Singapore): Command-center design and staff training for integrated developments. • Oerlikon HQ (New York, USA): Security redesign and emergency-procedures training for headquarters personnel. 5. Professional Education and Contributions • Author: The Complete Counter Terrorism Guide (2018) • Founder & Operational Director: The Counter Terrorist Magazine – Asia Pacific Edition • Program Developer: CTCB OnDemand Learning System – hosting over 40 professional courses on intelligence, security management, and emergency response. • Speaker & Educator: Regularly engaged by universities, government agencies, and professional forums on topics such as counter-terrorism, security innovation, and resilience strategy. • Media Commentator: Frequently interviewed by newspapers and broadcast media on counter-terrorism and security issues. Through these initiatives, Mr. Peretz has contributed significantly to the professionalization of the security industry, connecting practical field expertise with structured education and credentialing frameworks. 6. Professional Affiliations and Recognition • Board Member, Security Systems Association of Singapore (SSAS) • Board Member, Security Consultants Accreditation Board (SCAB) • Chairman, Counter Terrorism Certification Board (CTCB) • Member, Working Group for SS 558:2024 – Intruder Alarm Systems Code of Practice • Listed Competent Person, Ministry of Home Affairs (Singapore) – General Competence Requirements for Security Consultants Awards and Recognitions: Recognized by the Singapore Security Association for excellence in Video Analytics Implementation, Industry Digital Planning, and Job Redesign Initiatives for the Singapore Stock Exchange (SGX) project.

Cybersecurity expert with over a decade and a half of deep-dive experience, I bring an unparalleled level of understanding and expertise in strategic Cybersecurity planning, effective risk control, and pioneering product innovation. My career reflects my role as a reliable authority for organizations of all sizes, as well as an effective liaison with different regulatory bodies.

Nikolas Lamprou is a Principal Consultant in Vulnerability Management with 15 years of hands-on experience in IT, spanning web development and e-commerce before specialising in cybersecurity. He holds an MSc and industry certifications including GCFR, SC-200, Security+, PNPT, eJPT, and BTL1, and works daily at the intersection of vulnerability management, penetration testing, and practical security defence. He is also the founder of Solve Tech Today, where he writes clear, no-nonsense guidance on security, Windows, and everyday tech problems.

Co-Founder of SG6, ITRES and DEV6. Cybersecurity consultant with a deep technical background. More than 20 years of experience in the fields of IT Security, Cybersecurity, Security Research and IT Best Practices. Dozens of acredited CVE vulnerabilities since Y2K. I publish practical offensive/defensive research: vulnerability analysis, exploitation notes, reverse engineering, and hardening/detection takeaways.

Mark Lynd is the Head of Executive Advisory & Strategy at Netsync, one of the nation's leading value-added resellers, where he works daily with C-Suite executives on AI, cybersecurity strategy, and digital transformation. A 5x CIO/CISO, author, thought leader and keynote speaker with decades of hands-on operational experience, Mark brings a rare combination of boardroom perspective and practitioner depth to every engagement. Ranked as a Top 5 Global Thought Leader in both AI and Cybersecurity by Thinkers360, Mark has facilitated over 150 incident response tabletop exercises across school districts, Fortune 500 enterprises, healthcare systems, government agencies, and mid-market manufacturers. His original research from these exercises represents the most comprehensive tabletop dataset published by a single practitioner. Mark has delivered more than 100 keynotes at marquee events including RSA Conference, Oracle CloudWorld, Cisco Partner Summit, Dell Technologies World, IBM Think, and Gartner Security & Risk Management Summit. His speaking topics span AI generative strategy, AI infrastructure, cybersecurity operations, ransomware preparedness, incident response, and business continuity. He holds a Bachelor of Science degree from the University of Tulsa and attended The Wharton School. Mark served honorably in the United States Army's 3rd Ranger battalion, and 82d Airborne. My Newsletters: - Cybervizer: Weekly strategic briefings for 10k+ professionals. (www.cybervizer.com) - AI Bursts: Cutting through the noise of AI adoption. (www.aibursts.com) My Published Books: Books available on Amazon, Barnes & Noble, Apple Books, and many other outlets: - Cyber War: One Scenario – A guide to infrastructure resilience. - A Leader’s Playbook to Cyber Insurance – Managing the financial ROI of risk. - Cybersecurity Life Skills for Teens – My passion project for digital safety.

An experienced security professional helping security folks discover their best with HealthyByte. Previously built and led secure design functions at Insight, secured and protected thousands of websites per day at SiteLock alongside malware research at Sectigo, and currently building and scaling security for millions of rental cars at Turo. I’m curious and a lifetime learner across every field. Areas of Expertise & Interest: ‣ Enterprise/Corporate Security ‣ Infrastructure Security ‣ AWS Cloud Security ‣ Offensive Security (Red Teaming) ‣ Incident Detection and Response

Franco Velasquez is the CEO and founder of HostBreach, a cybersecurity advisory firm specializing in external cyber intelligence, attack surface analysis, and intelligence-driven advisory for defense contractors and regulated organizations. His work focuses on understanding how attackers identify, prioritize, and compromise targets using publicly available intelligence, often before traditional security controls detect activity. Franco advises organizations on CMMC readiness, CUI exposure, ransomware risk, and pre-incident threat visibility, helping leaders understand real-world risk beyond checklist compliance. He has experience working with OSINT-based reconnaissance, threat actor behavior analysis, and tabletop attack simulations aligned to observed intrusion patterns. He is frequently consulted on topics including ransomware trends, external exposure management, supply chain risk, and how attackers exploit misconfigurations and unpatched systems. Franco emphasizes practical, intelligence-led decision-making that helps organizations reduce risk before incidents occur.

Dr. Connie McIntosh is a cybersecurity executive, academic, mentor and international speaker. She currently serves as Head of Security at Ericsson. Dr. McIntosh integrates cybersecurity, information security, product security, operational security, and data privacy into business strategy, fostering psychological safety and cultural transformation in traditionally siloed environments. Her background is in National Security and Cyber Defense working in in key Cybersecurity Leadership roles across Defense and Government classified networks, Academia and private enterprise. Her leadership has earned her accolades such as being named among the Top 100 Women in Cybersecurity by US Cyber Defense Magazine and the Black Unicorn Award at Black Hat 2020. In 2025, she was awarded the prestigious Global Recognition Award for Leadership Excellence in cybersecurity underscoring her global recognition and influence along with 2025 Young Leader of the Year - The Fast Mode Awards 2025 recognizing exceptional individuals whose leadership, resilience, and technical depth continue to elevate the global telecom ecosystem. Connie's contributions to cybersecurity have been featured in influential books and magazines, including the groundbreaking Women4Cyber's own "Europe's Top Women in Security, Hacking Gender Barriers", along with "The Rise of Cyber Women Vol 3", "Shining the Spotlight - Stories for Business Success." and others.

Cyber Threat Intelligence Leader | Nation-State Actor Hunter | Strategic Defense Architect With over 20 years at the forefront of cybersecurity—including senior roles in national security and government defense—I specialize in threat hunting, APT campaign attribution, and intelligence-driven defense. My career spans proactive threat detection, incident response, and mentoring high-stakes SOC/CTI teams in classified environments. I’ve led national-level threat hunting operations, correlated complex TTPs using MITRE ATT&CK, and produced actionable intelligence for executive stakeholders. My expertise includes SIEM, SOAR, threat intelligence platforms, and secure infrastructure design, with a deep focus on the MENA region’s cyber threat landscape. As the author of “Inside the Hacker Hunter’s Mind” and “Inside the Hacker Hunter’s Toolkit”, I share real-world insights into state-level threat actors, OSINT, malware analysis, and digital forensics. I’m passionate about mentoring the next generation of cyber defenders and building resilient, intelligence-led security postures. Let’s connect to discuss cybersecurity challenges, threat intelligence, or how I can contribute to your mission. Key Skills: Cyber Threat Intelligence | APT Attribution | Incident Response | Threat Hunting | SIEM/SOAR | MITRE ATT&CK | OSINT | Malware Analysis | Secure Infrastructure | Executive Reporting | Python/C# Automation | MENA Threat Context

Hans Study is an independent network and security expert based in Ontario, Canada. He has spent fifteen years across the public sector, defence, public safety, and critical infrastructure, designing networks and physical security systems for organizations where reliability and operational security are not optional. His work is boutique. Enterprise networks, OT and ICS, controls and security systems, and the infrastructure underneath them. He specializes in hardening and tuning systems where the stakes are high and the margin for error is small. Primary stacks: Microsoft Windows, Cisco, Aruba, and Genetec Security Center, with regular work across most major physical security and network platforms. Hans is the author of The Study Guide series. Two titles are currently available: "The Study Guide to CCTV and Access Control Systems" and "The Study Guide to Network and System Hardening: A Field Guide for Systems and Security Integrators." Additional volumes are in development. The series is written for the people who have to make systems work, not for the people writing executive summaries about them. Hans develops technical courseware and educational content for practitioners and integrators, with post-secondary teaching experience in network security and Cisco CCNA. He hosts the StudyByt3s podcast covering the technical work that sits between IT, physical security, and OT. CISSP credentialed. Available for comment on network architecture, system hardening, physical security systems, Genetec deployments, OT and ICS security, CMMC and CPCSC compliance, security integrator practices, and IT and physical security convergence. Based in Ontario. Works with clients across Canada and the United States in government, public safety, defence, critical infrastructure, and enterprise environments. Sample quote on hardening: "The hardest part of hardening a system isn't the technical work. It's getting the organization to admit which controls have been ignored for the last five years." Sample quote on vendor selection: "The right system depends on the environment, not the rep. If a recommendation changes based on who's selling, that's not a recommendation. That's a sales quota." Media inquiries: media@hans.study. Same-day response.

Paul is a leading Cyber Security Expert and an integral part of the SSLTrust team. He is world-renowned for his knowledge of SSL/TLS Certificates and PKI Solutions, and enterprise companies and small business clients frequently seek his expert opinion on website security.

Roguevault News is an independent and authoritative voice in the cybersecurity world. For over a decade, we’ve built a reputation as a trusted source for balanced, timely, and in‑depth reporting.

Harman Singh, director at respected consultancy Cyphere, is an experienced security professional consulting public and private sector customers across the globe. He brings over a decade of intensive consulting experience, advising both private and public sector organisations on security matters around offensive and defensive security, particularly SOC operations maturity, CREST pen testing, risk and governance. Harman is recognised for his teaching ability; he is not just a consultant, but an educator of other experts: Black Hat Trainer: He has delivered advanced, practical training sessions at the prestigious Black Hat security conferences. Advanced Hacking: His training focuses on sophisticated techniques for attacking and defending complex digital infrastructure, upskilling security teams worldwide. Corporate Consulting: Beyond training, he possesses extensive experience consulting with corporate security teams, helping them manage threats across traditional networks and cloud-based systems. His insights—covering regulatory compliance, comments and best practices—are frequently featured in publications such as Infosecurity Magazine and Fast Company.

Joel Witts is the Content Director and co-founder of Expert Insights, a cybersecurity research and review platform read by thousands of CISOs, IT leaders, and security professionals worldwide. He leads a team of writers and journalists covering hundreds of cybersecurity categories, producing meticulously researched product reviews, buyers' guides, and industry reports. Joel has reviewed hundreds of cybersecurity solutions and interviewed leading experts from across the industry, including leaders from Microsoft, Google Cloud, Zscaler, and SentinelOne. He also hosts the Expert Insights Podcast and co-writes the weekly newsletter, Decrypted. Joel is driven to share his team's expertise with cybersecurity leaders to help them create more secure business foundations.

I’m a security consultant and the founder of North Star Group, where I help individuals, organizations, and communities strengthen their overall safety and preparedness. With over 20 years of experience across military and private-sector security, my work focuses on physical security assessments, threat and vulnerability analysis, CPTED principles, workplace violence prevention, and expert witness consulting. I’ve supported clients across a wide range of sectors—including education, government, business, healthcare, critical infrastructure, and houses of worship—by providing practical, real-world guidance rooted in proactive risk management. Whether it’s improving day-to-day security, planning for emergencies, or helping legal teams understand foreseeability and duty of care, I bring a layered and strategic approach to every situation. If you're looking for expert insight on how to build safer environments and reduce risk, I'm always open to contributing. *If any portion of my response is used, I’d appreciate attribution as follows: Daniel Loo, CPP®, PSS, SRMP — Principal Consultant at North Star Group, a Houston-based security and risk management firm.