Automate Hacker Intuition
We're building Sybil: an AI-driven pentester that discovers vulnerabilities before they're exploited. Join a team of builders from OpenAI, Meta, Mandiant, and Trail of Bits.
See Open Roles
Our Story
Built by researchers.
Driven by conviction.
Ari and Vlad met and agreed to redefine offensive security after each conducted frontier research with leading large language models at OpenAI and Meta.
They came to the same conclusion: it is not only possible to harness AI for hacking, it also enables security engineers to work more efficiently and produce higher-quality results than relying on humans alone.
The team brings together experience in AI research, internal and consulting red teaming, engineering at FAANG and leading self-driving car companies, and data science at the highest levels of both the private and public sectors.
They came to the same conclusion: it is not only possible to harness AI for hacking, it also enables security engineers to work more efficiently and produce higher-quality results than relying on humans alone.
The team brings together experience in AI research, internal and consulting red teaming, engineering at FAANG and leading self-driving car companies, and data science at the highest levels of both the private and public sectors.
Open AI
Meta
Mandiant
Palantir
NCC
Cruise
Trail of Bits
Aptiv
How We Work
We bias for action and toward shipping.
We're looking for people with a hunger to be on the leading edge of AI and security. The industry is clearly changing, and RunSybil is shaping that future.
01
Ship, Then Iterate
We prioritize velocity and iteration over lengthy planning cycles. The best way to learn is to put something in front of customers.
02
Think Like an Attacker
Our product automates hacker intuition. That means our team thinks creatively about breaking things, not just building them.
03
Quality of Thinking
Great products come from quality of thinking, not just following the right process. We ask "what are we really trying to do?" before jumping to solutions.
04
Preempt What's Next
We want people who have a habit of being right and a track record of seeing around corners. The threat landscape doesn't wait.
05
Engineering You Can Stand Behind
The best-engineered systems are the ones you're proud to tell the whole world about. We care about craft and we handle sensitive findings with discretion.
06
Company-Survival Mindset
We're a startup. Resource awareness, urgency, and ownership aren't buzzwords — they're how we operate every day.
Benefits
Built for people who do their best work.
Comprehensive Insurance
- Medical, dental, and vision (100% covered for employees, 80–85% for dependents)
- Travel insurance
- Pet insurance discounts
Wellbeing
- Mental health, coaching, fitness, primary care, and healthcare navigation support partnerships
- Employee Assistance Program (EAP) and additional emotional wellbeing resources
Time Off
- Unlimited PTO (20-day suggested minimum)
- 14 company holidays
- 12 weeks paid parental leave + flexible return to work
Financial Benefits
- 401(k) with a 3% auto-enrollment
- Employee discounts through a national perks platform
- Financial planning, mortgage support, and money management tools
- Commuter benefits
Work & Culture
- Remote or hybrid work options
- Company-provided laptop
- Regular team onsites and offsite
Interview Process
Transparent, respectful, and fast.
We run a structured interview process designed to respect your time and give you the best chance to show what you can do.
Recruiter Screen
30-45 min conversation about your background, motivation, and what you're looking for.
Interview Loop
Same-day loop with the engineering team. Collaborative, not adversarial. LLM use encouraged.
Founder Chat
Final conversation with our CEO about vision, culture, and mutual fit.
Offer
Fast decisions. We move quickly for the right people.
Open roles