Arsiem
Arsiem6mo ago

Network Based Systems Analyst II

United StatesUnited States·ArlingtonFull-timemid
OtherSystems AnalystBusiness Analysis & Process
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Quick Summary

Overview

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.

Technical Tools
splunkcybersecuritylinuxnetworking
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.  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 looking for a Network Forensics Cybersecurity Analyst. This position will support one of our Government clients in Arlington, VA.
  • Assists the government lead in coordinating teams in preliminary incident response investigations
  • Assists the government lead with interfacing with the customer while on-site
  • Determines appropriate courses of action in response to identified and analyses anomalous network activity
  • Assesses network topology and device configurations, identifying critical security concerns and providing security best practice recommendations
  • Assists with the writing and publishing of Computer Network Defense guidance and reports on incident findings to appropriate constituencies
  • Collects network intrusion artifacts (e.g., PCAP, domains, URIs, certificates, etc.) and uses discovered data to enable mitigation of potential Computer Network Defense incidents
  • Analyzes identified malicious network activity to determine weaknesses exploited, exploitation methods, effects on the system, and information
  • Collects network device integrity data and analyzes for signs of tampering or compromise
  • Assists 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
  • BS Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma & 4-6 years of network investigations experience.
  • 2+ 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, 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 designing cybersecurity systems and environments in a Linux and/or Windows environment
  • Proficiency with virtualized environments
  • Desired Certifications:
  • DoD 8140.01 IAT Level II, IASAE II, CSSP Analyst
  • DoD 8140.01 GCIA, GCIH, CSSP Analyst/CSSP Incident Responder
  • DoD 8140.01 CEH, CSSP Analyst
  • SANS GIAC GNFA preferred

    • Location & Eligibility

    Where is the job
    Arlington, United States
    On-site at the office
    Who can apply
    US
    Listed under
    United States

    Listing Details

    Posted
    October 30, 2025
    First seen
    April 8, 2026
    Last seen
    May 10, 2026

    Posting Health

    Days active
    32
    Repost count
    0
    Trust Level
    31%
    Scored at
    May 10, 2026

    Signal breakdown

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    ARSIEM Corporation is an IT consulting firm specializing in cybersecurity solutions and training for government and private sector clients.

    Employees
    125
    Founded
    2013
    Domain
    arsiem.com
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