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first*defense Customer Success Manager

The Customer Success Manager (CSM) acts as liaison between selected SNOCC customers, Nexum technical resources such as the Network Security Engineer, the Account Executive, and the MSSP management team. The CSM will be responsible for maintaining cadence with our largest ASC support customers, our VIP Managed Services accounts, and our MSSP customers who do not […]

Security Operations Guide

MDR and SOC and MSSP and SIEM and EDR and XDR and SOAR, Oh My! This free guide will examine these terms, their meaning, and how they relate to each other.

SNOCC Quarterly Threat Update Q1 2023

Each quarter, the managed security team at Nexum shares insights from our first*defense SNOCCs. In this post, macro trends include vulnerabilities in Exchange, socially engineered phishing, IoT, Edge and infrastructure devices, and geo-blocking.


Nexum Leadership Team Meet the Nexum leadership team and use the links to connect with us on LinkedIn. David J Lesser Founder, President & CEO David started Nexum in 2002 to create a security products and services firm that puts clients first and foremost. A technologist, businessman, and member of multiple industry advisory boards, David […]

Attack Observations Since the Russian Invasion of Ukraine

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Nearly a month has passed since the start of the Russian invasion of Ukraine. Before this, the “Cold War” of cyberattacks has consisted of plenty of nation-state-sponsored activity against Western targets. But until now, this activity has not been a weaponized component in an active physical conflict with Western countries (whether direct or, in this case, by proxy).

Why Nexum first*defense?

Why Nexum first*defense®? Optimize your resources, defend your investments, and take back your network with Nexum first*defense, our suite of managed and monitored services. We know it’s a constant struggle to find the necessary resources to run your network security operations effectively. Nexum can augment your team’s operations by monitoring for attacks, investigating potential breaches, […]

Staying Ahead of the Curve, Managing Upgrade Paths

Written by George Elgin, Nexum Principal Engineer Our partners at Palo Alto Networks recently acknowledged PAN-OS 10.0.5 as a preferred release in the 10.0 code train. This announcement sparked a conversation with my peers about the general issue of code upgrades, which I thought the greater community might find interesting. For this article, I’m focusing […]


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We Mean Security® Empowering organizations to conduct mission-critical business securely and efficiently Let’s Play a Game (of Deception)In the final post of our Ransomware Series, we’ll examine deception technology, how it has evolved, and how to tilt the odds in your favor to win the cybersecurity game.LEARN MORE first*defense® Managed & Monitored ServicesNexum’s first*defense can […]


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Trusted in Security Since 2002 Nexum® is a cybersecurity and networking company that builds and defends global networks, empowering organizations to conduct mission-critical business securely and efficiently. We take a holistic, value-based approach to cybersecurity and networking that includes best-of-breed products, professional services, certified training courses, manufacturer-authorized support, and monitored and managed services. Founded in […]