This will be a short one. After four years in my current role, I have accepted a position with a new organization. My last day is next Friday.

I am not going to name names - either the company I am leaving or the one I am joining - because this blog has always been about ideas and analysis rather than personal branding. But I wanted to acknowledge the transition publicly because it has prompted some reflection on how the security industry has changed in the time I have been in this seat.

What Changed

When I started this role in 2005, the security conversation in enterprises was dominated by perimeter defense. Firewalls, IDS, antivirus - the three pillars of "keep the bad stuff out." Network Access Control was an emerging concept that most organizations viewed with skepticism. Compliance was becoming a driver for security spending, but SOX and PCI were still relatively new pressures that many organizations were figuring out how to address.

Four years later, the landscape looks fundamentally different. The perimeter has dissolved - or at least become so porous that the term has lost much of its meaning. Laptops move between corporate networks, home networks, hotel networks, and coffee shop networks. Data lives in email archives, on USB drives, in SaaS applications, and increasingly in the cloud. The attack surface has expanded enormously, and the defensive model has not kept pace.

The most significant shift, in my view, has been the growing recognition that security is a risk management discipline rather than a technology discipline. When I started, success was measured in terms of tools deployed and vulnerabilities patched. Now it is increasingly measured in terms of risk reduced relative to business objectives. That is a healthier framing, even if we are still figuring out how to quantify it reliably.

What I Learned

The most valuable lesson from these four years is that organizational culture determines security outcomes more than any technology investment. I have seen organizations with modest budgets and strong security cultures outperform organizations with seven-figure security budgets and weak executive support. Tools matter. Architecture matters. But the willingness of an organization to take security seriously as a business function - that matters more.

The second lesson is that vendor relationships require constant vigilance. Vendors are not your adversaries, but their incentives are not perfectly aligned with yours. The product that solves their quota problem is not always the product that solves your security problem. Maintaining enough technical depth to evaluate vendor claims independently is one of the most important skills a security professional can develop.

What Is Next

The new role involves more strategic responsibility and a broader scope than what I have been doing. I am looking forward to the challenge. There will probably be a period where posting frequency drops as I get up to speed, but I intend to keep writing here. The topics may shift somewhat as my perspective changes, but the goal remains the same: honest analysis of enterprise security for people who do this work every day.

Thanks to the readers who have followed along. More to come.