Below0Day Email Formats
Contact top employees from
Below0Day
- Below0Day uses 6 different email formats. The most common is lastName_firstNameInitial (for example, doe_j@Below0Day.com), which appears in about 74% of work addresses.
- Other common patterns include:
- firstNameInitial_lastName: j_doe@Below0Day.com (8%)
- firstName-lastName: jane-doe@Below0Day.com (12%)
Below0Day’s Popular Email Formats
| Format | Example | Percentage |
|---|---|---|
Format lastName_firstNameInitial |  doe_j@Below0Day.com | Percentage: 74% |
Format firstName-lastName | jane-doe@Below0Day.com | Percentage: 12% |
Format firstNameInitial_lastName | j_doe@Below0Day.com | Percentage: 8% |
Format lastName | doe@Below0Day.com | Percentage: 4% |
Format firstNameInitial_lastNameInitial | j_d@Below0Day.com | Percentage: 1% |
Format firstNameInitial-lastNameInitial | j-d@Below0Day.com | Percentage: 1% |
Contact top employees from
Below0Day
Scott JelenSenior Technical Project Manager
Scott JelenDirector of Managed Services
VladimirFounder & RedTeam Lead
Jason LeitnerFounder & President
Bas KuisSecure Coding Specialist
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Below0Day Corporate Information: FAQ
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’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 uses 6 email formats across its organization. The most common pattern is lastName_firstNameInitial (e.g., doe_j@Below0Day.com), used in approximately 74% of work addresses.
Below0Day currently employs over 10-50 people from United States, with a head office in Milwaukee, wi.
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