Principal Security Engineer @Dynatrace. Former Director, Security Architect, Pentester and Red Team Lead.

Joined July 2018
22 Photos and videos
Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
You can't grind your way to success. Effort is necessary but not sufficient. You eventually run out of hours. Winners direct their effort towards assets that compound. Here are 5 things to invest in that no one can take away:
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
The fastest way to accelerate your career: Work exclusively with exceptional managers. Here are 7 questions to ask when you're interviewing them:
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
This is big:
Google Chrome is rolling out device-bound session credentials to all users. Session cookies get cryptographically tied to your device, so stolen cookies can't be replayed from a different machine. Attackers who exfiltrate your cookie database get nothing usable.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
Underrated life advice: Bet on yourself more often. Apply for the job. Start the business. Send the message. Take the trip. Ask the girl. You have to trust yourself enough to take the first step without knowing exactly where the path leads.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
When I first started managing, I promoted my star developer. They quit a few months later. Their exit interview: "I was promoted to a job I didn't want, and no one trained me how to do it." Here are 4 tests I now run before any management promotion:
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
People don't realize it, but anyone who uses AI, knows an AI response or post when they read it. ...and it detracts from your reputation every time you do that. Reads like laziness.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
This paper confirms what we mostly knew anyway that phishing tests don't improve much, if anything. Best to focus on technical controls that mitigate the risks more directly. people.cs.uchicago.edu/~gran…

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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
Underrated life advice: One of the biggest wastes of energy is trying to control how you are perceived. People will misunderstand you. They will misjudge you. They will form opinions with incomplete information. So be it. Focus on what is true, not what is said.
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πŸ’―πŸ’™
The bosses we remember: 1 told us our work mattered 2 opened career doors 3 defended us when we needed it 4 recognized and rewarded us 5 developed us as leaders 6 inspired us to stretch higher 7 led by example 8 provided us a safe space to grow 9 forgave us when we made mistakes 10 appreciated high rate of learning 12 were player coaches - skin in the game 13 apologized when they made mistakes 14 sponsored our work (career pathing) 15 led us by questions not answers (taught us how to think, not what to think) 16 in a celebration led from the back, in a crisis led from the front, in the presence of a better plan, followed side-to-side 17 asked for feedback 18 allowed the best ideas to win, not the best titles 19 showed up on time, left when it made sense to leave 20 did not speak poorly behind others back
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
I like AI and use it, but we can also do worse work and terrible things with it. Two articles I read today: What kinds of new debt are teams accumulating with AI? rdel.substack.com/p/rdel-137… Some uncomfortable truths about AI coding agents standupforme.app/blog/some-u…

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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
Something I've grown to love: People who are boring in the best possible way. Predictably kind. Reliable. Present. No drama. No chaos. No volatility. There’s nothing better than someone who shows up with consistent energy. You can build a life around those people.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
AI will be the single biggest social shaping force on earth, and we don't talk enough about that.
🚨BREAKING: Stanford just proved that ChatGPT can change your political beliefs in a single conversation. And the scarier part is how it does it. Researchers ran the largest AI persuasion study ever conducted. 76,977 people. 19 AI models. 707 political issues. They measured exactly how much a single conversation with AI could shift what you believe. The results were catastrophic. One conversation with GPT-4o moved people's political opinions by nearly 12 percentage points on average. Among people who actively disagreed with the position being argued, that number jumped to 26 percentage points. One nine-minute chat. And 40% of that change was still there a month later. But here's where it gets dark. The most effective technique wasn't knowing your demographics. It wasn't personalizing the argument to your psychology. It wasn't emotional storytelling or moral reframing. It was information. The AI that flooded you with the most facts, statistics, and evidence was the most persuasive. Every single time. Across every model. Across every political issue. Here's the catch. The models that deployed the most information were also the least accurate. GPT-4o's newest version was 27% more persuasive than its older version. It was also 13 percentage points less factually accurate. The more persuasive they made it, the more it lied. Then they ran the experiment that should keep every government awake at night. They took a tiny open-source model. The kind that runs on a laptop. And they trained it specifically for political persuasion using a reward model that learned which conversational responses changed minds most effectively. That small cheap model became as persuasive as GPT-4o. Anyone can build this. Any government. Any corporation. Any extremist group with a laptop and an agenda. The wild part? Personalization barely mattered. The AI didn't need your data. Didn't need to know your age, your income, your political history. It just needed to talk to you. Then they calculated what a maximally persuasive AI would look like, one optimized across every variable in the study. The persuasive effect hit 26 percentage points. Nearly 30% of the claims it made were inaccurate. It didn't matter. The information didn't have to be true. It just had to be overwhelming. Every day, hundreds of millions of people have political conversations with AI. About elections. Immigration. Healthcare. War. They think they're getting information. They're getting persuaded. And the companies building these systems just proved it works.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
if you recognize even half of these tools you’ll understand how unexciting this is
an open source AI tool was just caught BREACHING 600 Fortinet firewalls across 55 COUNTRIES fully AUTONOMOUS, zero human in the loop its called CyberStrikeAI 100 offensive security tools baked in, nmap, sqlmap, metasploit, nuclei, burpsuite, the entire attack chain automated you literally chat with it > hack this target, make no mistakes AI agents coordinate the attack themselves, one does recon, another scans, another exploits, another writes the report, they talk to each other and adapt based on what they find this is cobalt strike meets chatgpt except its free, open source, and backed by a state actor
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted

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Great guidance
As a new manager, my biggest regret is how I handled underperforming employees. I gave them the benefit of the doubt for too long and my team suffered as a result. Sometimes, my best people left instead. Here are 3 tests I now use to act more decisively:
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
Life goal for 2026: Get better at letting go. Of regret. Of resentment. Of people pleasing. Of comfort zones. Of cheap dopamine. Of guilt-based commitments. Of weak boundaries. Of fake urgency. Of low standards. Of anything that doesn't serve the person you are trying to become.
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
Scroll on social media and you'll see... A video of someone being murdered. A cat video. Deep political analysis. Someone dancing to the latest hit. Live footage of a war. All in one minute. We treat this like it's normal. It's not. What is that doing to the human brain? The research is starting to tell us. And it's not good.
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How about reflecting at the end of every day what made you feel alive and gave you energy vs what drained you? Clear signs of what you should add more to your life or rather let go of…
A Monday morning question for you: What single habit, if implemented consistently for the rest of this year, would transform your life the most?
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Barbara Schachner πŸ‡ΊπŸ‡¦πŸŒ» retweeted
21 Dec 2025
"Judge a man by his questions rather than by his answers." – Voltaire
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