devZero Security LLC

devZero Security LLC is a Virginia-based firm providing offensive and defensive cybersecurity services to government and cleared clients. The company is certified as a Service-Disabled Veteran-Owned Small Business (SDVOSB) and Veteran-Owned Small Business (VOSB), and its personnel hold active TS/SCI clearances (US and NATO). The company's services span three main areas. First, red team and adversary emulation engagements simulate full-spectrum offensive operations against production environments, including assumed breach scenarios, phishing, browser-in-the-middle attacks, Active Directory exploitation, domain mapping, attack path analysis, ransomware simulation, and data exfiltration, using modern command-and-control and evasive tooling. Second, detection engineering work is conducted alongside client detection teams to close telemetry and alerting gaps identified during offensive operations. This includes rule fine-tuning, ATT&CK coverage mapping, purple team validation, detection-as-code integrated into CI/CD pipelines, and closed-loop verification by re-running attack paths after remediation. Third, security architecture services cover design, engineering, implementation, and integration of network and identity architectures aligned to DoD and CISA Zero Trust reference architectures and NIST/RMF frameworks, including segmentation and least-privilege enforcement across cloud and hybrid environments. Personnel hold certifications including OSEP, OSCP, CRTO, CRTL, ENARSI, CCNP, CCNA, CASP+/SecurityX, and SANS SEC535. The company is registered under NAICS codes for engineering services, computer systems design, and technical consulting, and holds SBA SDVOSB/VOSB certifications along with VIP Graduate status from the National Veteran Institute for Procurement.