Network Security Analyst 1 (Onsite)

Serigor•Austin, TX

1d•Onsite

About The Position

The Network Security Analyst I performs advanced cybersecurity analysis and threat triage activities within the Cybersecurity Operations Center. Work involves continuously monitoring, triaging, analyzing, and prioritizing cybersecurity alerts; investigating suspicious activity; identifying potential threats; and coordinating incident response activities to protect agency information systems, networks, and data. Serves as a primary point of contact for security event analysis, threat identification, and incident escalation.

Requirements

Minimum of five (5) years of experience in cybersecurity operations, security monitoring, incident response, threat detection, security investigations, or related cybersecurity disciplines.
Experience working with one or more of the following technologies: SIEM platforms (NetWitness, Microsoft Sentinel, Splunk, QRadar, ArcSight, LogRhythm, etc.) Microsoft Security (Microsoft 365 Defender XDR, Microsoft Sentinel) Endpoint Detection and Response (Microsoft Defender for Endpoint, CrowdStrike, SentinelOne, etc.) IDS/IPS technologies (Trellix/FireEye, Corelight) Threat intelligence platforms (VirusTotal, Google Threat Intelligence, Cisco Talos, Recorded Future, MISP) Vulnerability management tools (Tenable, Qualys, Rapid7) Email security platforms (IronPort ESA, Abnormal.ai, Proofpoint) Cloud security monitoring solutions (Google Wiz, MDCA, Cortex Cloud, Sysdig) Secure Access Service Edge (Zscaler, Prisma, Netskope)
Experience triaging security alerts, analyzing security events, and documenting incident investigations.
Experience with cybersecurity frameworks, incident response processes, and threat detection methodologies.
Knowledge of: Cybersecurity Operations Center (CSOC/SOC) operations and best practices.
Knowledge of: Security incident triage, analysis, investigation, and escalation procedures.
Knowledge of: Security monitoring technologies, including SIEM, EDR/XDR, IDS/IPS, firewalls, endpoint security solutions, and cloud security platforms.
Knowledge of: Common cyber threats, attack vectors, malware, phishing campaigns, insider threats, and advanced persistent threat (APT) techniques.
Knowledge of: Threat intelligence concepts, indicators of compromise (IOCs), indicators of attack (IOAs), and MITRE ATT&CK methodologies.
Knowledge of: Windows, Linux, networking protocols, Active Directory, Microsoft Entra ID, cloud environments, and enterprise security controls.
Knowledge of: Incident response lifecycle and cybersecurity frameworks such as NIST Cybersecurity Framework, NIST Incident Response guidance, and PICERL.
Skill in: Security event analysis and threat triage.
Skill in: Correlating and interpreting data from multiple cybersecurity tools.
Skill in: Investigating suspicious activity and identifying indicators of compromise.
Skill in: Using SIEM, EDR/XDR, threat intelligence, vulnerability management, and case management platforms.
Skill in: Producing clear documentation, incident reports, and technical communications.
Skill in: Prioritizing and managing multiple investigations in a fast-paced operational environment for a large organization.
Skill in: Knowledge of and experience with query languages such as KQL, Lucene, SPL, ESQL, etc.
Skill in: Knowledge of and experience with scripting languages such as PowerShell, Python, Bash, etc.
Ability to: Analyze complex security events and distinguish legitimate threats from false positives.
Ability to: Make risk-based decisions during incident investigations.
Ability to: Execute established incident response and escalation procedures.
Ability to: Collaborate effectively with security engineers, incident responders, system administrators, CISO leadership, and business stakeholders.
Ability to: Communicate technical information clearly to both technical and non-technical audiences.
Ability to: Work independently and as part of a 24x7 cybersecurity operations team.

Nice To Haves

Graduation from an accredited four-year college or university with major coursework in cybersecurity, information security, computer science, computer information systems, management information systems, or a related field is preferred.
Relevant education and experience may be substituted for one another.
CompTIA Security+
GIAC Certified Incident Handler (GCIH)
GIAC Certified Intrusion Analyst (GCIA)
Certified SOC Analyst (CSA)
Microsoft Cybersecurity Analyst (SC-200)
Other GIAC or SOC-related certifications

Responsibilities

Monitors, analyzes, and triages cybersecurity alerts generated by Security Information and Event Management (SIEM), Endpoint Detection and Response (EDR), cloud security, email security, identity protection, and network security platforms.
Conducts initial investigations of detected and reported security events to determine severity, scope, impact, and potential risk to agency operations.
Identifies, validates, and prioritizes potential cybersecurity incidents, escalating confirmed threats to Incident Response, Threat Hunting, or SOC Engineering teams according to established procedures.
Correlates security events from multiple data sources, including endpoints (EDR), firewalls, intrusion detection systems (IDS), intrusion prevention systems (IPS), cloud services, authentication systems, and threat intelligence feeds.
Reviews and analyzes indicators of compromise (IOCs), suspicious network activity, phishing emails, malware detections, and anomalous user behavior.
Documents investigations, findings, and response actions in ticketing and case management systems to ensure accurate tracking and reporting.
Assists with incident containment, eradication, and recovery efforts by coordinating with technical teams and stakeholders.
Reports and escalates to the CSOC Team Lead and/or SOC Manager.
Supports the continuous improvement of threat detection capabilities through alert tuning, process refinement, threat intelligence integration, and identification of false-positive trends.
Performs vulnerability assessment reviews and evaluates identified vulnerabilities for potential risk and remediation prioritization.
Supports development and maintenance of operational procedures, playbooks, workflows, and knowledge base articles related to threat detection and incident response.
Researches emerging cyber threats, attack techniques, tactics, and procedures (TTPs) to improve detection and response effectiveness.
Participate in incident response, escalation, and after-action review activities as needed.
Support enterprise security monitoring for systems that process, store, or transmit sensitive information.
Follow the Client policies, procedures, standards, and applicable state and federal security requirements.
Maintain accurate operational documentation, investigation notes, metrics, and leadership-ready summaries.
Must be able to provide support outside of normal business hours during high-priority security incidents, as approved by the SOC Manager.