Network Based Systems Analyst

Network Based Systems Analyst (Cyber Network Defense Analyst (CNDA) 4ARSIEM Corporation is committed to fostering a proven and trusted partnership with our government clients. We provide support to multiple agencies across the United States Government. ARSIEM has an experienced workforce of qualified professionals committed to providing the best possible support. As demand increases, ARSIEM continues to provide reliable and cutting-edge technical solutions at the best value to our clients. That means a career packed with opportunities to grow and the ability to have an impact on every client you work with.ARSIEM is seeking a Senior CDNA to use information collected from various 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 to protect information, information systems, and networks from threats. This job will support one of our Government clients in Arlington, VA.ResponsibilitiesAssists the Government lead in coordinating teams in preliminary incident response investigationsAssists the Government lead with interfacing with the customer while on-siteDetermines appropriate courses of action in response to identified and analyses anomalous network activityAssesses network topology and device configurations, identifying critical security concerns and providing security best practice recommendationsCollects network intrusion artifacts (e.g., PCAP, domains, URIs, certificates, etc.) and uses discovered data to enable mitigation of potential Computer Network Defense incidentsAnalyzes identified malicious network activity to determine weaknesses exploited, exploitation methods, effects on the system, and informationCollects network device integrity data and analyzes for signs of tampering or compromiseAssists 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 engagementsMinimum QualificationsBS Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma & 7-9 years of network investigations experience.5+ years of directly relevant experience in network investigationsIn-depth knowledge of CND policies, procedures, and regulationsIn-depth knowledge of TCP/IP protocolsIn-depth knowledge of standard protocols ICMP, HTTP/S, DNS, SSH, SMTP, SMB, NFS, etc.In-depth knowledge and experience of Wifi networkingIn-depth knowledge and experience of network topologies, DMZs, WANs, etc.Substantial knowledge of Splunk (or other SIEMs)Understanding of MITRE Adversary Tactics, Techniques, and Common Knowledge (ATT&CK)Knowledge of Computer Network Defense policies, procedures, and regulationsKnowledge of defense-in-depth principles and general attack stages with respect to network security architectureAbility to characterize and analyze network traffic to identify anomalous activity and potential threats to network resourcesAbility to identify and analyze anomalies in network traffic using metadataExperience with reconstructing a malicious attack or activity based on network trafficExperience examining network topologies to understand data flows through the networkMust be able to work collaboratively across physical locationsPreferred QualificationsSubstantial knowledge of network device integrity concepts and methodologiesProficiency with network analysis software (e.g., Wireshark)Proficiency with carving and extracting information from PCAP dataProficiency with non-traditional network traffic (e.g., Command and Control)Proficiency with preserving evidence integrity according to standard operating procedures or national standardsProficiency with virtualized environmentsDoD 8140.01 IAT Level II, IASAE II, CSSP Analyst, GCIA, GCIH, CSSP Analyst/CSSP Incident Responder, CEHSANS GIAC GNFAThis position requires an active TS/SCI clearance and the ability to obtain Department of Homeland Security (DHS) Suitability.ARSIEM is proud to be an Equal Opportunity and Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age, or any other federally protected class.