Network System Analyst

Location: Arlington, VA

Security Clearance: Active Top Secret (TS/SCI) clearance required

Node provides remote and onsite advanced technical assistance, proactive hunting, rapid onsite incident response, and immediate investigation and resolution using host‑based, network‑based, and cloud‑based cybersecurity analysis capabilities. Team personnel provide front‑line response for digital forensics/incident response (DFIR) and proactive hunting for malicious cyber activity. We are seeking Cyber Network Defense Analysts (CNDA) to support this critical customer mission.

• Assist the Government lead in coordinating teams in preliminary incident response investigations
• Assist the Government lead with interfacing with the customer while on site
• Determine appropriate courses of action in response to identified and analyzed anomalous network activity
• Assess network topology and device configurations, identify critical security concerns, and provide security best‑practice recommendations
• Collect network intrusion artifacts (e.g., PCAP, domains, URIs, certificates, etc.) and use discovered data to enable mitigation of potential Computer Network Defense incidents
• Analyze identified malicious network activity to determine weaknesses exploited, exploitation methods, and effects on systems and information
• Collect network device integrity data and analyze for signs of tampering or compromise
• Assist with real‑time CND incident handling (forensic collections, intrusion correlation and tracking, threat analysis, and advising on system remediation) tasks to support onsite engagements

• U.S. citizenship
• Must have an active TS/SCI clearance
• Must be able to obtain DHS Suitability
• 5+ years of directly relevant experience in network investigations
• In‑depth knowledge of CND policies, procedures, and regulations
• In‑depth knowledge of TCP/IP protocols
• In‑depth knowledge of standard protocols (ICMP, HTTP/S, DNS, SSH, SMTP, SMB, NFS, etc.)
• In‑depth knowledge and experience of Wi‑Fi networking
• In‑depth knowledge and experience of network topologies (DMZs, WANs, etc.)
• Substantial knowledge of Splunk (or other SIEMs)
• Understanding of MITRE ATT&CK
• Knowledge of Computer Network Defense policies, procedures, and regulations
• Knowledge of defense‑in‑depth principles and general attack stages with respect to network security architecture
• Ability to characterize and analyze network traffic to identify anomalous activity and potential threats to network resources
• Ability to identify and analyze anomalies in network traffic using metadata
• Experience with reconstructing a malicious attack or activity based on network traffic
• Experience examining network topologies to understand data flows through the network
• Must be able to work collaboratively across physical locations

• Substantial knowledge of network device integrity concepts and methodologies
• Proficiency with network analysis software (e.g., Wireshark)
• Proficiency with carving and extracting information from PCAP data
• Proficiency with non‑traditional network traffic (e.g., Command and Control)
• Proficiency with preserving evidence integrity according to standard operating procedures or national standards
• Proficiency with virtualized environments

BS in Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma & 7‑9 years of network investigations experience.

• DoD 8140.01 IAT Level II, IASAE II, CSSP Analyst, GCIA, GCIH, CSSP Analyst/CSSP Incident Responder, CEH
• SANS GIAC GNFA preferred

• Medical
• Dental
• Vision
• Basic Life
• Long‑Term Disability
• Health Savings Account
• 401K
• Three weeks of PTO
• 10 Paid Holidays
• Pre‑Approved Online Training