Network Systems Analyst IV

About ARSIEM Corporation

At ARSIEM Corporation we are committed to fostering a proven and trusted partnership with our government clients. We provide support to multiple agencies across the United States Government. Our experienced workforce of qualified professionals is dedicated to providing the best possible support.

As demand increases, we continue 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.

Network Forensics Cybersecurity Analyst

• 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, identifying critical security concerns and providing security best practice recommendations.
• Assist with the writing and publishing of Computer Network Defense guidance and reports on incident findings to appropriate constituencies.
• 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, effects on system and information.
• Assist 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.
• Provide technical briefings as required.

• BS in Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma & 10+ years of network investigations experience.
• 8+ years of directly relevant experience in network investigations.
• In‑depth knowledge of CND policies, procedures, and regulations.
• In‑depth knowledge of standard protocols – ICMP, HTTP/S, DNS, SSH, SMTP, SMB, NFS, TCP/IP.
• In‑depth knowledge and experience of Wifi networking.
• In‑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 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.
• DoD 8140.01 IAT Level II, IASAE II, CSSP Analyst, GCIA, GCIH, CSSP Analyst/CSSP Incident Responder, CEH.
• SANS GIAC GNFA preferred.

Active TS/SCI clearance with the ability to obtain Department of Homeland Security (DHS) Entry on Duty (EOD) Suitability is required.

ARSIEM is proud to be an Equal Opportunity and Affidavit Act 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.