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HomeCompaniesArsiemNetwork Based Systems Analyst III

Network Based Systems Analyst III

Arsiem · Arlington, VA · On Site · Active · Lever

Job facts

FieldValue
CompanyArsiem
TitleNetwork Based Systems Analyst III
Normalized title-
Department / teamSystems Analyst / 0008-0003
LocationArlington, VA, United States
Work modelOn Site
Employment typeFull Time
Salary-
Statusactive
ATS providerLever
Posted / first seen2025-11-04 / 2026-05-29
Changed / last seen2026-05-29 / 2026-06-06

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PageWhat it containsOpen
Company jobsActive postings from Arsiem.Open
Company breakdownsRole, location, ATS, and work model facets for this company.Open
ATS provider jobsActive postings observed through Lever.Open
Provider filtered searchThe same provider as a filtered job collection.Open
City jobsActive postings in Arlington.Open
Department jobsActive postings in Systems Analyst.Open
Work model jobsActive On Site postings.Open
Lifecycle eventsOpen, update, close, and reopen events for this posting.Open
Original postingCanonical source or apply URL captured from the ATS.Open

Linked records

CompanyArsiem
Source017268e1-454e-4c3f-b641-8da3ae7efde3
ATS providerLever

Description

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 Cyber Network Defense Analyst to monitor network activity and identify and report events that occur, or might occur, within the network, in order to protect information, information systems, and networks from threats. CNDAs review data collected to analyze cyber events and the network environment, identifying trends, patterns, or anomaly correlations that indicate more serious attacks or future threats. The CNDAs will recommend proactive measures to contain the incident. These proactive measures include, but are not limited to, identifying intruders, local changes/suspect interactions; isolation; in-depth digital media analysis; consultation with law enforcement or counterintelligence organizations; development of signatures to detect this malicious behavior; and development and deployment of eradication tools.  This position will support one of our Government clients in Arlington, VA. Clearance Requirement: This position requires an Active TS/SCI clearance and the ability to obtain Department of Homeland Security (DHS) Entry on Duty (EOD) Suitability. Candidate Referral: Do you know someone who would be GREAT at this role? If you do, ARSIEM has a way for you to earn a bonus through our referral program for persons presenting NEW (not in our resume database) candidates who are successfully placed on one of our projects. The bonus for this position is $3,500,  and the referrer is eligible to receive the sum for any applicant we place within 12 months of referral. The bonus is paid after the referred employee reaches 6 months of employment. 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. Responsibilities The majority of the CNDA's time (75%) will be spent executing the following tasks: Characterize and analyze network traffic to identify anomalous activity and potential threats to network resources Coordinate with enterprise-wide cyber defense staff to validate network alerts Document and escalate incidents (including the event's history, status, and potential impact for further action) that may cause ongoing and immediate impact on the environment Perform cyber defense trend analysis and reporting Perform event correlation using information gathered from a variety of sources within the enterprise to gain situational awareness and determine the effectiveness of an observed attack. Provide daily summary reports of network events and activity relevant to cyber defense practices. Receive and analyze network alerts from various sources within the enterprise and determine possible causes of alerts. Provide timely detection, identification, and alerting of attacks/intrusions, anomalous activities, and misuse activities, and distinguish these incidents and events from benign activities. Utilize cyber defense tools for continuous monitoring and analysis of system activity to detect malicious activity. Analyze identified malicious activity to determine weaknesses exploited, exploitation methods, effects on the system, and information. Determine tactics, techniques, and procedures (TTPs) for intrusion sets Examine network topologies to understand data flows through the network Identify and analyze anomalies in network traffic using metadata Conduct research, analysis, and correlation across a wide variety of all source data sets (indications and warnings) Validate intrusion detection system (IDS) alerts against network traffic using packet analysis tools Identify applications and operating systems of a network device based on network traffic Reconstruct a malicious attack or activity based on network traffic Identify network mapping and operating system (OS) fingerprinting activities Assist in the construction of signatures that can be implemented on cyber defense network tools in response to new or observed threats within the network environment or enclave Notify designated managers, cyber incident responders, and cybersecurity service provider team members of suspected cyber incidents and articulate the event's history, status, and potential impact for further action in accordance with the organization's cyber incident response plan Approximately 25% of the CNDA's time will be spent executing the following tasks: Prepare and update manuals, instructions, and operating procedures Evaluate established methods and procedures and prepare recommendations for changes in methods and practices where appropriate. Plan and execute challenging and complex assignments, and develop innovative methods, approaches, and procedures. Conduct analyses and recommend resolutions for complex issues affecting the specialty area. Ensure optimal use of commercially available products Prepare and present reports Evaluate the effectiveness of installed systems and services Minimum Qualifications BS Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma & 7-9 years of network investigations experience. 5+ years of direct relevant experience in cyber defense analysis using leading-edge technologies and industry-standard cyber defense tools Experience successfully developing and deploying signatures Experience detecting host and network-based intrusions via intrusion detection technologies (e.g., Snort) Experience implementing incident handling methodologies Experience implementing protocol analyzers Experience collecting data from a variety of cyber defense resources Experience reading and interpreting signatures (e.g., Snort) Experience performing packet-level analysis Experience conducting trend analysis Preferred Qualifications GSEC (SANS401), ArcSight (or other SIEM solution), Network+, Security+, and Python programming experience would be ideal. Strong math and science background. Experience with the Carnegie Mellon SiLK tool suite. GNFA, GCIH, GCIA, GSEC, CASP+, CySA+, PaLMS, FedVTE

Full job record

Job IDa56413cbf4c05d8a093c00d011f52b3b022bef0d
Org ID2db0e30f-960e-49a1-a9b4-49ffbe613325
Source ID017268e1-454e-4c3f-b641-8da3ae7efde3
Board ID017268e1-454e-4c3f-b641-8da3ae7efde3
Providerlever
Provider Job Key0777a15d-7854-4f24-b476-59bffb1dbdf7
TitleNetwork Based Systems Analyst III
Normalized Title
Statusactive
Activeyes
Location TextArlington, VA
DepartmentSystems Analyst
Team0008-0003
Employment TypeFull-time
Workplace Typeon_site
Remote Policy
CountryUnited States
RegionVA
CityArlington
Salary Raw
Salary Min
Salary Max
Salary Currency
Salary Period
Source URLhttps://jobs.lever.co/arsiem/0777a15d-7854-4f24-b476-59bffb1dbdf7
Apply URLhttps://jobs.lever.co/arsiem/0777a15d-7854-4f24-b476-59bffb1dbdf7/apply
First Seen At2026-05-29 07:08:33Z
Last Seen At2026-06-06 18:44:29Z
Last Checked At2026-06-06 18:44:29Z
Last Changed At2026-05-29 07:08:33Z
Inactive At
Source Posted At2025-11-04 17:11:07Z
Source Updated At
Raw Payload Uris3://job-postings-prod-raw-590183727216/raw/provider=lever/board=arsiem/date=2026-06-06/2026-06-06T18-44-28-898Z-16c569b4d4a4fa41865d8c46c03515e275f0ffe19eeef81c009aedbde882011f.json
Event Fields
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Parsed Structured
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Extensions
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Native Structured
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      "text": "Responsibilities",
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