Computer Network Defense (CND) Analyst

Maximus; Arlington (VA); On-site; USD 110,000 - 150,000; Full time

Job summary

Maximus is seeking an experienced Computer Network Defense Analyst to support the Defense Information Systems Agency (DISA) CESO program in Rosslyn, VA. This on-site role requires an active Top Secret clearance with SCI eligibility and involves monitoring, incident response, and threat investigation across CESO operations.

The candidate will analyze security telemetry, investigate anomalous activity, document findings, and coordinate with technical teams supporting mission-critical services.

Qualifications

• Bachelor's degree or 4 years of relevant work experience in cybersecurity operations.

Responsibilities

• Perform computer network defense monitoring, detection, analysis, and incident-response activities.
• Monitor cybersecurity tools and applications for alerts and investigate identified events.
• Collect and analyze information from security telemetry and logs.
• Correlate and analyze cybersecurity events to develop escalation and mitigation recommendations.
• Document security events, findings and response actions in ticketing systems.
• Collaborate with various teams to align monitoring with CESO requirements.
• Identify opportunities to improve CND processes and workflows.

Skills

Cybersecurity monitoring

Incident response

SIEM analysis

Network defense

Windows & Linux

Cloud (AWS, Azure)

Technical writing

Communication

Education

Bachelor's degree in Computer Science, Information Systems, Engineering, or related field

4 years of relevant work experience may be considered in lieu of the degree

Tools

Splunk

Elastic

Job description

Maximus is seeking an experienced Computer Network Defense (CND) Analyst to support the Defense Information Systems Agency (DISA) Compartmented Enterprise Services Office (CESO) program in Rosslyn, VA.

The CND Analyst will support network-defense monitoring, cybersecurity event analysis, incident detection and response, and threat investigation across the CESO enterprise. The position will analyze security telemetry, investigate anomalous activity and indicators of potential compromise, document findings, recommend mitigation actions, and coordinate with technical teams supporting mission‑critical services.

This role is on‑site in Rosslyn, VA and requires an active Top Secret clearance with SCI eligibility.

Maximus TCS (Technology and Consulting Services) Internal Job Profile Code: TCS056, T2, Band 5

Job‑Specific Essential Duties and Responsibilities

• Perform computer network defense monitoring, detection, analysis, and incident‑response activities to identify and characterize anomalous or potentially malicious activity.
• Monitor cybersecurity tools and applications for alerts, indicators, and suspicious activity and investigate identified events.
• Collect and analyze information from CND tools, including intrusion‑detection alerts, firewall and network‑traffic logs, host‑system logs, and related security telemetry.
• Correlate and analyze cybersecurity events and anomalies and develop appropriate escalation, response, and mitigation recommendations.
• Perform persistent monitoring of designated networks, systems, and enclaves supporting CESO services.
• Investigate reported or detected cyber incidents and support first‑level response activities.
• Document security events, technical analysis, findings, and response recommendations in applicable ticketing or case‑management systems.
• Perform required system checks and maintain complete and accurate network‑defense documentation.
• Support analysis of current and emerging cybersecurity threats and assist with threat assessment activities.
• Collaborate with infrastructure, storage, database, application, cloud, and cybersecurity teams to align monitoring and response activities with CESO operational requirements.
• Identify opportunities to improve CND processes, procedures, operational documentation, and analytical workflows.
• Communicate network‑defense findings and recommended actions clearly to CESO technical teams and customer stakeholders.

Job‑Specific Minimum Requirements

• Active Top Secret clearance with SCI eligibility.
• Willingness and ability to obtain CI Poly, if required.
• DoD 8140 IAT Level II or Level III compliant certification, such as Security+ CE.
• Experience performing Computer Network Defense, cybersecurity monitoring, security‑event analysis, or cyber incident‑response activities.
• Experience monitoring intrusion‑detection, network‑defense, SIEM, or comparable cybersecurity technologies and analyzing resulting alerts.
• Strong knowledge of enterprise networking and network communications protocols.
• Experience analyzing information from IDS/IPS systems, firewalls, network traffic, and host/system logs.
• Working knowledge of Windows and Red Hat/Linux environments.
• Familiarity with cloud environments including AWS and Azure.
• Experience reviewing system and network logs manually and through SIEM/log‑analysis technologies such as Splunk or Elastic.
• Experience documenting security analysis, findings, mitigation recommendations, and response activities through ticketing or case‑management systems.
• Familiarity with application and hardware security configuration practices in secure government environments.
• Strong analytical, troubleshooting, technical writing, and communication skills.
• Bachelor's degree in Computer Science, Information Systems, Engineering, or related field.
• 4 years of relevant work experience may be considered in lieu of the degree requirement.
• Minimum of five years of related professional experience in cybersecurity operations, CND, security monitoring, incident response, or related technical field.
• Experience supporting enterprise cybersecurity or CND operations.
• DoD, Intelligence Community, DISA, or similarly secure federal environment experience is preferred.

Preferred Skills and Qualifications

• Prior Computer Network Defense experience in a large enterprise or DoD/IC environment.
• Experience monitoring intrusion‑detection and CND technologies and analyzing the resulting alerts.
• Hands‑on experience with Splunk, Elastic, or comparable SIEM/log‑analysis platforms.
• Strong network and system log‑analysis experience.
• Prior DISA or DISA mission partner experience.
• Familiarity with secure cloud environments.
• Understanding of disaster‑recovery and business‑continuity concepts in secure environments.

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EEO Statement

Maximus is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information and other legally protected characteristics.

Pay Transparency

Maximus compensation is based on various factors including but not limited to job location, a candidate's education, training, experience, expected quality and quantity of work, required travel (if any), external market and internal value analysis including seniority and merit systems, as well as internal pay alignment. Annual salary is just one component of Maximus's total compensation package. Other rewards may include short- and long-term incentives as well as program‑specific awards. Additionally, Maximus provides a variety of benefits to employees, including health insurance coverage, life and disability insurance, a retirement savings plan, paid holidays and paid time off. Compensation ranges may differ based on contract value but will be commensurate with job duties and relevant work experience. An applicant's salary history will not be used in determining compensation. Maximus will comply with regulatory minimum wage rates and exempt salary thresholds in all instances.

• health insurance coverage
• life and disability insurance
• a retirement savings plan
• paid holidays
• paid time off

Accommodations

Maximus provides reasonable accommodations to individuals requiring assistance during any phase of the employment process due to a disability, medical condition, or physical or mental impairment. If you require assistance at any stage of the employment process—including accessing job postings, completing assessments, or participating in interviews,—please contact People Operations at [e-mail].