Cybersecurity & Penetration Testing
Proactive threat assessment, network security, and rapid incident response from one of America's most experienced cyber defense teams. We protect you before an attack and help you recover after one.
Cybersecurity Services
GDF began as a cybersecurity firm and has spent three decades on the front lines of cyber defense: preventing breaches, responding to attacks, and supporting prosecution of cybercriminals. Our team combines deep technical skill with hands-on courtroom experience, giving us a unique perspective that pure security firms cannot match.
Today, GDF is on retainer as the primary security partner for numerous Fortune 100 companies, financial institutions, healthcare systems, and government agencies. Our proactive services keep organizations secure; our response services minimize damage when attacks succeed.
Penetration Testing
GDF's ethical hacking team conducts rigorous penetration tests against your infrastructure to identify vulnerabilities before attackers do. Our penetration tests follow industry-standard methodologies including OWASP, PTES, and NIST frameworks. For a systematic inventory of weaknesses, see our vulnerability assessment services, and deliver thorough written reports with prioritized remediation guidance.
- External network penetration testing
- Internal network penetration testing
- Web application security testing
- Social engineering assessments
- Physical security assessment
- Wireless network security testing
- Cloud infrastructure assessment (AWS, Azure, GCP)
- Red team / blue team exercises
Breach Response & Remediation
When a breach occurs, every minute counts. GDF's Incident Response teams are available 24 hours a day, 7 days a week, 365 days a year. We can be on-site at most U.S. locations within hours of notification and can begin remote triage immediately.
Our breach response methodology follows NIST SP 800-61 and includes immediate containment, forensic preservation of evidence with the same rigor as our network forensics practice, root cause analysis, remediation planning, regulatory notification support, and post-incident hardening to prevent recurrence.
Regulation Compliance
GDF helps organizations in regulated industries achieve and maintain compliance with cybersecurity mandates, including HIPAA, PCI-DSS, SOX, GLBA, CMMC, NIST 800-171, and state privacy laws. Our compliance assessments identify gaps, prioritize remediation, and prepare organizations for audits and regulatory reviews.
Remote Worker Security
The expansion of remote work has dramatically expanded the attack surface of most organizations. GDF provides remote worker security services that assess the security posture of remote endpoints, VPN configurations, cloud access policies, and identity management practices, and implements hardening measures appropriate for the modern distributed workforce.
Last updated: April 14, 2026
Network Security Assessment
A complete evaluation of your network architecture, firewall rules, segmentation, access controls, and monitoring capabilities. We identify the paths an attacker would take and close them before they can be exploited.
Forensic Readiness Planning
We help your organization implement logging, monitoring, and data retention policies that ensure forensic evidence is available if a breach occurs, dramatically reducing forensic analysis time and cost.
Threat Intelligence
GDF's analysts monitor threat intelligence feeds and dark web sources for indicators of compromise specific to your industry, providing actionable intelligence to defend against emerging threats.
Security Awareness Training
Human error remains the leading cause of successful attacks. We train your employees to recognize phishing, social engineering, and insider threat scenarios through realistic simulations and hands-on workshops.
Protect Your Organization
Don't wait for an attack. A proactive assessment from GDF can identify critical vulnerabilities before they become critical incidents.