Cyber Network Defense Analyst

Company: Solutions³ LLC
Location: Arlington
Posted on: February 20, 2026

Job Description:

Job Description Job Description Title: Cyber Network Defense Analyst Description: Solutions³ LLC is supporting our prime contractor and their U.S. Government customer on a large mission critical development and sustainment program for on and offsite incident response to Government agencies and critical infrastructure owners who experience cyber-attacks. Solutions³ LLC provides remote and onsite advanced technical assistance, proactive hunting, rapid onsite incident response, and immediate investigation, using host-based, network-based, and cloud-based cybersecurity analysis capabilities. Solutions³ LLC is seeking a Cyber Network Defense Analyst (CNDA) to support this critical mission by providing front line response for digital forensics/incident response (DFIR) and proactively hunting for malicious cyber activity. The CNDA will use 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, to protect information, information systems, and networks from threats. Eligibility: Must be a US Citizen Must have an active TS/SCI clearance Must be able to obtain DHS Suitability prior to starting employment 2 years of directly relevant experience in cyber defense analysis using leading edge technologies and industry standard cyber defense tools Responsibilities Include: 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 event's history, status, and potential impact for further action) that may cause ongoing and immediate impact to 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 possible attacks/intrusions, anomalous activities, and misuse activities and distinguish these incidents and events from benign activities Use cyber defense tools for continual monitoring and analysis of system activity to identify malicious activity Analyze identified malicious activity to determine weaknesses exploited, exploitation methods, effects on system and information Identify and analyze anomalies in network traffic using metadata 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 off network traffic Identify network mapping and operating system (OS) fingerprinting activities Assist in the construction of signatures which can be implemented on cyber defense network tools in response to new or observed threats within the network environment or enclave Required Skills: 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 Desired Skills: Python programming experience Strong math and science background Experience with Carnegie Mellon SiLK tool suite Desired Certifications: One or more of the following professional certifications: GNFA, GCIH, GCIA, GSEC, CASP, CySA, PaLMS, FedVTE GSEC (SANS401), Arcsight (or other SEIM solution), Network, Security Required Education: BS Computer Science, Cyber Security, Computer Engineering, or related degree; or HS Diploma and 4 years of network investigations experience Powered by JazzHR pZZt5TaNFy

Keywords: Solutions³ LLC, Reston , Cyber Network Defense Analyst, IT / Software / Systems , Arlington, Virginia