S4x25 is Feb 11 – 13
JW Marriott Tampa Water Street
We’re excited to move S4 to Tampa for 2025. The JW Marriott is bigger and newer. We won’t need to limit the number of attendees. We will have bigger spaces for S4 Stages, Birds of a Feather events, industry meetings and other activities. While we will miss the Welcome Party and Cabana Sessions, the S4 Big Party on Wednesday night will offer even more than those past two events. Tampa is different too. Different vibe; different opportunities; and different challenges. It’s a great canvas for S4.
Check out the S4x25 page for key dates, sponsor information and the latest updates.
We still like Miami South Beach and will back there at least one more time for S4x26 (23-26 February 2026).
S4x25 Call For Presentations Opens In
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S4 is …
Optimistic … Forward Looking … Creative … Driving Change
Set free a conservative, slow moving, change resistant community to discover new ideas and come up with innovative ways to use these new ideas to deploy secure, resilient and better ICS.
After a Covid caused cancellation of S4x21, S4 came roaring back with a record 800 attendees and warmth of spirit at S4x22. S4x23 in February sold out with 1,100 attendees, and this will be the attendee limit for S4x24. More important than the numbers were the percentage of new and diverse talent we are seeing and the spirit that has been maintained at S4 despite the growth from 40 people in a small room in 2007.
The best way to understand how S4 is different is to come to the event. The second best way is to ask someone who has attended, obviously we are biased. S4 is not for everyone. If you are an early adopter, like to be on the leading edge, or enjoy hearing, considering and creating new ideas, then there is a good chance S4 will be a great event for you.
Create The Future of OT and ICS Security at S4
An ICS CTF At S4x22
Reid Wightman used to run an epic ICS Capture The Flag (CTF) event at S4 that had many teams working around the clock in a very competitive contest. The S4 CTF was retired at S4x20, and replaced with the Pwn2Own competition. Still there were many past attendees who...
PLC/Controller Offensive & Defensive Sessions At S4x22
Ten years ago, at S4x12, we sprang Project Basecamp on the world and showed the scope and impact of insecure by design and vulnerable PLCs and Level 1 devices. So it is only fitting that S4x22 has some bleeding edge Purdue Model Level 1 security sessions. It begins...
Women In ICS Security Wednesday
Women represent 51% of the population, and 60% of those attending college today. And yet only about 10% of the ICS security community are women. It often is difficult for women to enter and thrive in the male dominated, sometimes hostile, and often intentionally and...
Autobahn 301-Level Training Day Agenda
How do we follow up the 101-Level Onramp training and 201-Level Highway training? Of course, by heading out on the Autobahn with 301-Level training on the Monday prior to S4x22, January 24th. The more advanced content requires longer sessions, so the Autobahn will...
Two Free S4x22 Basic Sponsor Spots
The Cabana Sessions are a highlight of S4 every year. The social time around the pool in the warm weather gives attendees time to establish and renew relationships and have leisurely discussions. The sponsors who have Cabanas are a part of this as we hope they will...
It’s Out! Top 20 Secure PLC Coding Practices
It began with Jake Brodsky's S4x20 session on tips and tricks he had learned in his long career with a water utility to improve the resiliency, maintenance and security of a PLC and the underlying physical process. Today, it results in the release of Version 1.0 of...