Below0Day: Detailed Company Information & Corporate Profile
Summary
Below0Day was founded in 2016 and is headquartered in Milwaukee, Wisconsin. The boutique firm employs between ten and fifty professionals and reports annual revenue in the $1‑$10 million range. Specializing in cyber security, it delivers enterprise security services on a global scale that include penetration testing, vulnerability scanning, phishing simulation, audit and standards assistance, consulting, and training.
Below0Day’s portfolio covers comprehensive managed security services—from secure coding support to Red Team operations—providing clients with rigorous testing and compliance guidance. The company’s approach blends industry best practices with hands‑on expertise to uncover weaknesses before attackers do.
The team is led by founder and president Jason Leitner, who oversees strategy and client relationships. Senior technical project manager Scott Jelen directs project delivery while also heading managed services. Secure coding specialist Bas Kuis ensures code integrity, and founder Vladimir commands the Red Team to simulate advanced threats.
| Below0Day Website | Below0Day.com |
| Industries | |
| Below0Day Headquarters Address | 123 Milwaukee ave, wi, US |
| Company Size | 10-50 employees |
| Specialities & Services | Enterprise Security Services on a Global Scale, Penetration Testing, Audit and Standards Assistance, Consulting, Pen Testing, Training, Phishing, Vulnerability Scanning, Security Services |
| Founded | 2016 |
| Estimated Annual Revenue | $1 - 10M |
| Updated: | 2026-09-23 |
Workforce Turnover
Length of Employment
Below0Day's workforce includes employees across a wide range of tenure levels.
100% have been with the company for 8 to 10 years
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Below0Day Corporate Information: FAQ
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