Host Based Systems Analyst IV

Arlington, VA, 1099, W2

Our Client has an immediate need for 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 proactively hunting for malicious cyber activity. They are seeking Cyber Network Defense Analysts (CNDA) to support this critical customer mission. The CDNA uses information collected from a variety of sources to monitor network activity and analyze it for evidence of suspicious behavior. Monitoring and analysis are performed to identify and report events that occur, or might occur, within the network, in order to protect information, information systems, and networks from threats.


  • Assist customer with coordinating preliminary incident response investigations
  • Assist customer interface with external customers
  • Determine appropriate course of action in response to identified and analyses 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, URI’s, certificates, etc.) and uses discovered data to enable mitigation of potential Computer Network Defense incidents
  • Analyze identified malicious network activity to determine weaknesses exploited, exploitation methods, effects on system and information
  • Collect network device integrity data and analyze for signs of tampering or compromise
  • Assist customer with real-time CND incident handling (i.e., forensic collections, intrusion correlation and tracking, threat analysis, and advising on system remediation) tasks to support onsite engagements


  • TS/SCI Clearance
  • Able to obtain DHS Suitability
  • BS Computer Science, Cybersecurity, Computer Engineering or related degree; or HS Diploma and 10+ years of network investigation experience
  • 8+ 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 Wifi networking
  • In depth knowledge and experience of network topologies – DMZ’s, WAN’s, etc.
  • Substantial knowledge of Splunk (or other SIEM’s)
  • Understanding of MITRE Adversary Tactics, Techniques and Common Knowledge (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
  • Desired Certifications: GCFA, GCFE, EnCE, CCE, CFCE, CISSP, IASAE II, GCIA, GCIH, CSSP Analyst, CSSP Incident Responder, CEH, SANS GIAC GNFA preferred

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