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Mark Simos @markasimos.bsky.social · 11/10/2026

One of thing I talked about in my last Tampa BSides talk is how security and business leaders can and must work together effectively as accountable and responsible stakeholders. Video Here - www.youtube.com/watch?v=l0cC... Link to download the slides here - zerotrustplaybook.com/events/

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Mark Simos @markasimos.bsky.social · 04/10/2026

What is success in cybersecurity? Rapid incident response and remediation? Preventing things from going bump in the night? Both of are part of it as they contribute to overall security success of attacker failure. Video - www.youtube.com/watch?v=iOfg...

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Mark Simos @markasimos.bsky.social · 03/10/2026

I love MITRE ATT&CK …but it doesn't tell the whole story I recently published a video on YouTube describing a 3-D view of adversaries we face, how it relates to & expands on ATT&CK (+ legacy Lockheed Martin kill chain), & how they are using AI today. www.youtube.com/watch?v=fgPv...

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Mark Simos @markasimos.bsky.social · 27/09/2026

One way to visualize why organizations must view IT systems as business assets, must own all the risks including security, and must shift security integration left is to take a long view over the asset's lifetime.

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Mark Simos @markasimos.bsky.social · 25/09/2026

The recording for "Security is team sport, but we aren’t planning like a team" is now live! Recording - www.youtube.com/watch?v=l0cC... Slides - www.slideshare.net/slideshow/se...

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Mark Simos @markasimos.bsky.social · 22/09/2026

I recently released a new video "Know Your Attacker" that covers who the attackers we face are, why they do it, and how they approach attack operations (including how they are using generative AI today), and what this means for you. www.youtube.com/watch?v=fgPv...

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Mark Simos @markasimos.bsky.social · 21/09/2026

I just released a new video "Zero Trust Explained" www.youtube.com/watch?v=6bqf... It covers ► What Zero Trust is (fixing broken assumptions from classic security) ► How this concept evolved, how Zero Trust is required for AI security (and is accelerated by AI) ⬇️

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Mark Simos @markasimos.bsky.social · 13/09/2026

I've been a little bit quiet lately because I've been (re)building my YouTube channel - Mark on Cybersecurity I just posted the first 3 new videos. Share and Enjoy! MarkonCyber.com

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Mark Simos @markasimos.bsky.social · 04/09/2026

Hey all, I recorded a short video with a preview of the sessions and standards we will talking about at the FREE Security Forum event in Arlington, VA (near Washington DC) meet.opengroup.org/event/cbab26... Registration closes September 7 Would love to see you there!

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Mark Simos @markasimos.bsky.social · 03/09/2026

Come hear the authors in speak in person (and ask them questions) on the upcoming Security Matrix standard. We will be live at the upcoming Security Forum event in Washington DC on September 15-17. (technically Arlington, VA) Agenda & register here - meet.opengroup.org/event/cbab26...

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Mark Simos @markasimos.bsky.social · 01/09/2026

If you are in the Washington DC area, you are invited to a free vendor-neutral event focused on the toughest cybersecurity challenges Sep 15-17 aka.ms/TOGevent I would love to see you all there!

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Mark Simos @markasimos.bsky.social · 30/08/2026

One of the things its easy to forget about cybersecurity is that our adversaries are creative and intelligent humans with goals, talents, preferences, limitations, blind spots, etc. just like us.

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Mark Simos @markasimos.bsky.social · 23/08/2026

I am going to be talking on just about every aspect of security in person over 2 days at the free security forum event from The Open Group You can register for FREE for this Washington DC event here: meet.opengroup.org/event/cbab26... Would love to see you there!

◾ A Unified Set of Standards for Security: Security and Zero Trust Body of Knowledge
◾ Security is EVERYONE’S Job: The Security Roles and Glossary Standard
◾ Who are They, and Why are They Attacking Us?: Building Realistic Requirements for Security with the Security Matrix Standard
◾ Building Security into your Organization: Security Principles for Architecture and the Zero Trust Commandments
◾ AI-Driven Attacks and Software Exploitation (Mythos, MDASH and More)
◾ AI and Zero Trust
◾ Speaking to the Board about Security
◾ DevSecOps and Zero Trust
◾ Making Decisions using CRQ: Applying the Open FAIR™ Methodology to Zero Trust Implementation

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Mark Simos @markasimos.bsky.social · 20/08/2026

New headshot! Who dis? Time catches up with us all. I didn't quite realize how old my headshot was (circa 2012) until I calculated that one of my teenage kids wasn't even born when my last headshot was taken. 😂

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Mark Simos @markasimos.bsky.social · 19/08/2026

What should a board be looking for in their oversight of security management? What does good look like? The Open Group provides a standard definition as part of the accountabilities of board members - see Part 3.1 of publications.opengroup.org/s252

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Mark Simos @markasimos.bsky.social · 15/08/2026

Do you want to be a CISO that can block projects? No! You don't! CISOs don't want this authority unless you want to own all their other outcomes/risks of the project (financial targets, safety, legal, personnel, etc.), which would make them a business leader, not a CISO 🧵

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Mark Simos @markasimos.bsky.social · 31/07/2026

One thing SAF does well is to help you connect business priorities to architecture, controls, processes, operations (as well as Microsoft implementation guidance). We many programs struggle with this. See aka.ms/SAF (no paywall, no registration)

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Mark Simos @markasimos.bsky.social · 29/07/2026

Controlling access requires a subject, verb, and object (regardless of whether it involves humans, AI agents, data, deterministic systems, or physical objects) - Who or what is requesting access? - What action are they taking? - What business asset are they touching?

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Mark Simos @markasimos.bsky.social · 28/07/2026

The “keeping secrets from family” antipattern in SAF captures a common failure: incident learnings stay trapped inside SecOps a short 🧵

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Mark Simos @markasimos.bsky.social · 21/07/2026

Trying to communicate security & risk better with business colleagues? Microsoft published tips, learnings, and best practices as part of the new Security Adoption Framework (SAF) guidance. (no ads, no registration) learn.microsoft.com/en-us/securi...

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Mark Simos @markasimos.bsky.social · 20/07/2026

We need to have an honest conversation about legacy systems… Most organizations have unsupported systems that they aren’t able to change or move and this creates business risk. This is normal and common, no surprise. 🧵

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Mark Simos @markasimos.bsky.social · 11/07/2026

The Azure Security Podcast episode just dropped for the new Security Adoption Framework (SAF) documentation. Podcast - azuresecuritypodcast.azurewebsites.net Docs - aka.ms/SAF

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Mark Simos @markasimos.bsky.social · 10/07/2026

Are you still applying security patches as an exception? or patching by default? One of the biggest impacts of Mythos, MDASH, and other AI vuln discovery/exploit technologies is that you have to get really good at all aspects of software vulnerability management. 🧵

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Mark Simos @markasimos.bsky.social · 02/06/2026

SAF also ties together all of Microsoft's historical guidance (SDL, IR playbooks, Immutable laws of security, etc.) into a single organized framework that guides your security modernization journey.

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Mark Simos @markasimos.bsky.social · 02/06/2026

Microsoft just released 200+ pages of documentation for the Microsoft Security Adoption Framework (SAF) that includes and is built on the MCRA, CISO Workshop, and other SAF workshops

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Mark Simos @markasimos.bsky.social · 02/06/2026

The SAF documentation site and June 2026 MCRA just went live on Microsoft Learn! Check it out and let us know what you think! aka.ms/SAF Note: This is the first release and we will be continuing to add to it. Send us your feedback, requests, and ideas.

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Mark Simos @markasimos.bsky.social · 29/05/2026

I keep hearing people are "Automating Tier 1 with AI" (or some other job) and I think words really matter here. ◾ Are you trying to replace a human person with AI? Assigning a human role to AI? ◾ Are you automating the tasks currently being done by people? a short 🧵

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Mark Simos @markasimos.bsky.social · 26/05/2026

Security can never “win the game” - it's not the job we signed up for. We are the defense squad so we don't score goals or points - we just keep opponents from scoring points.

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Mark Simos @markasimos.bsky.social · 23/05/2026

One of the most critical skillsets for CISOs is their ability to navigate the power structure of an organization (e.g. politics) I included this slide in my recent Tampa BSides talk (slides posted, recording pending) - zerotrustplaybook.com/events/ 🧵

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Mark Simos @markasimos.bsky.social · 21/05/2026

Understanding and using the Why/What/How Chain is critical for everyone in security. I covered this in my Tampa BSides talk. Link to download the slides (and other past slides) here - zerotrustplaybook.com/events/ 🧵

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Mark Simos @markasimos.bsky.social · 18/05/2026

I just posted the slides for my 'Security is a Team Sport (but we are NOT playing like a team)' session at BSides Tampa Check out the Events page for the link to those slides as well as videos/slides from previous talks. zerotrustplaybook.com/events/

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Mark Simos @markasimos.bsky.social · 15/05/2026

Just putting the finishing touches on slides for my BSides Tampa talk "Security is a Team Sport ... but we are NOT playing as a team" Hope to see you there on Saturday!

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Mark Simos @markasimos.bsky.social · 10/05/2026

BSides South Florida was a great conference in a beautiful venue right on the beach! I am grateful to have the opportunity to speak and to gain insight from thoughtful talks and hallway conversations with Rey Bango, Bill Barnard, Jim Routh, Oscar Kourany, and more!

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Mark Simos @markasimos.bsky.social · 10/05/2026

This version added a new section on AI because of all the misperceptions on this technology (very powerful, but not panacea). I also updated the event page with slides from this talk (it wasn't recorded) as well as slides and recordings from previous talks

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Mark Simos @markasimos.bsky.social · 10/05/2026

I just posted the slides for my BSides South Florida talk on the events page zerotrustplaybook.com/events/

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Mark Simos @markasimos.bsky.social · 04/05/2026

I recently did an interview-style session for an internal Microsoft team on why end to end security is so important and thought I would share my notes on the points to cover. 🧵

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Mark Simos @markasimos.bsky.social · 03/05/2026

The Zero Trust Playbook site is live! It currently has a summary of the series, the outline of the first book, some information on the authors, and an events page with upcoming events and recordings. Much more to come in time!

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Mark Simos @markasimos.bsky.social · 30/04/2026

The full length video has been posted for the announcement of the security roles and glossary standard! ◾ Video - www.youtube.com/watch?v=bMRr... ◾ Slides - www.slideshare.net/slideshow/se...

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Mark Simos @markasimos.bsky.social · 29/04/2026

Are the people in your organization rewarded to ignore security?

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Mark Simos @markasimos.bsky.social · 28/04/2026

One of the statements that really stuck with me from this episode was around the 'advanced persistent threat' terminology. Paraphrasing - the persistence is more important to attacker success than the advanced. I definitely recommend listening thecyberwire.com/podcasts/aft...

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Mark Simos @markasimos.bsky.social · 31/03/2026

AI Inherits speed and scale from the GPUs it runs on, but it inherits unpredictability from the (social) human data it was trained on. a short 🧵

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Mark Simos @markasimos.bsky.social · 23/03/2026

What does a CEO need to know about cybersecurity? See the (draft) Security Roles and Glossary standard for what knowledge, skills, & abilities are required of CEOs, board members, and other leaders (as well as accountabilities, fiduciary duty, & more). publications.opengroup.org/s252

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Mark Simos @markasimos.bsky.social · 16/03/2026

Cybersecurity is often incorrectly seen as a 'technical problem' that can be 'solved' (it isn't!) by business leaders & others. *Security is an ongoing risk that requires ongoing work.* Security leaders often accidentally create or reinforce this misperception. a short 🧵

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Mark Simos @markasimos.bsky.social · 14/03/2026

Think security can do it all on our own? WRONG! We must recognize that we are part of a larger team and each of us has a different part to play in protecting the organization. short 🧵

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Mark Simos @markasimos.bsky.social · 13/03/2026

The video for my 'What's my job again' talk from BSides Tampa has posted Video - www.youtube.com/watch?v=uVAA... Slides - www.slideshare.net/slideshow/wh... Roles standard - publications.opengroup.org/s252

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Mark Simos @markasimos.bsky.social · 10/03/2026

100% agree! Part of our job is to advise and educate our professional colleagues. I made this graphic for business leaders, but it also applies to practitioners supporting other folks From Part 2 of publications.opengroup.org/s252

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Mark Simos @markasimos.bsky.social · 10/03/2026

Ever been tempted to call people "stupid users" because they make a basic security or technology mistake? I would advise against saying this and encourage you to change your thinking patterns. A short 🧵

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Mark Simos @markasimos.bsky.social · 07/03/2026

I recently realized that the 'autonomous SOC' idea is the same old snake oil packaged up with a fancier and more intellectual-sounding name The 'technology can prevent attacks / stop breaches' claim that has been disproven over and over (similar to compliance claims) a 🧵

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Mark Simos @markasimos.bsky.social · 26/02/2026

I am excited to talk about one of my favorite topics at BSides Tampa on May 16! *Security is a team sport (and we are NOT playing like a team)*

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Mark Simos @markasimos.bsky.social · 09/02/2026

Pursuing perfect solutions is a perfect waste From Chapter 6 - How to Scope, Size, and Start Zero Trust (Page 78) of www.amazon.com/Zero-Trust-O... 🧵

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