We break in. So they can't.
Terminate the Threat
500+
Engagements
98%
Client Retention
0%
Breaches Post-Audit
Better us than them.
Null Cipher Security is an offensive security firm run by operators with 25 years breaching hard targets across federal and enterprise environments. We emulate real adversaries - full-chain, assumed-breach - then tell you which findings actually matter.
Who We Are
Most red teamers have never had to own the risk. Ours has.
We've breached mature, EDR heavy environments, and we've sat in the CISO chair answering to a board. Our reports don't just list findings; they tell you which one would end your business, and what to fund first. Attacker's tradecraft, a defender's judgment.
From Fortune 500 enterprises to fast-growing startups, we've helped organizations across every sector discover and fix their critical security gaps before adversaries could exploit them.
What We Do
Offensive Security
Services.
ONE
Penetration Testing
Comprehensive ethical hacking engagements that identify, exploit, and document vulnerabilities before real attackers can. From web apps to full network infrastructure.
Web Application Testing (OWASP Top 10)
Network & Infrastructure Pentest
Internal & External Assessments
Mobile Application Testing
API Security Testing
Social Engineering
TWO
Red Teaming
Full-scope, multi-vector adversarial simulations that test your organization's people, processes, and technology against sophisticated, real-world threat actors.
APT Simulation & Threat Emulation
Physical Intrusion Testing
Full Kill-Chain Engagements
Custom Malware Development
C2 Infrastructure Setup
Purple Team Exercises
THREE
vCISO Services
Fractional Chief Information Security Officer services that provide executive-level security leadership, strategy, and governance — without the cost of a full-time hire.
Security Program Development
Risk Management & Assessment
Security governance and risk advisory support
Board-Level Security Reporting
Security Policy & Procedure
Vendor Risk Management
How We Operate
The Threat Is Real.
Are You Ready?
01
Attacker-First Methodology
02
Elite Certified Team
Our practitioners hold OSCP, OSCE, CEH, CISSP, and CISM certifications. Every engagement is led by a senior security specialist with 5+ years of hands-on offensive experience.
03
Reports That Actually Matter
No jargon-filled PDFs that gather dust. We deliver clear, prioritized findings with business impact ratings, proof-of-concept exploits, and step-by-step remediation guidance.
04
Post-Engagement Support
We don't disappear after delivering findings. Our team remains available for remediation verification, follow-up questions, and retest assessments included in every engagement.
Every engagement is designed from the adversary's perspective using MITRE ATT&CK framework, real threat intelligence, and the same tools and techniques used by nation-state actors.
1
2
3
Discovery Call
We understand your environment, goals, risk appetite, and define scope
Execution
Live adversarial testing using real-world techniques and tools
Fix support, verification testing, and a clean bill of health certificate
Remediation & Retest
Client Stories
Trusted by Security-Conscious Organizations
"Valiant CS found a critical authentication bypass in our payment system that our internal team completely missed. Their red team engagement was eye-opening. Professional, thorough, and genuinely invested in our security outcomes."
James R.
CTO, FinTech Startup
"Their vCISO service transformed our security posture. We went from having no formal security program to achieving SOC 2 Type II in under a year. The team is exceptional — they communicate complex issues in board-friendly language."
Sarah M.
CEO, Healthcare Tech
CISO, Enterprise Retail
David K.
"Their vCISO service transformed our security posture. We went from having no formal security program to achieving SOC 2 Type II in under a year. The team is exceptional — they communicate complex issues in board-friendly language."
Find out what an adversary already knows about you.
A short scoping call, no obligation.
