Senior Cybersecurity Engineer – Elastic SIEM

About the role

Maximus is seeking a Senior Cybersecurity Engineer – Elastic SIEM. This role is on-site in San Antonio, TX and requires an active TS/SCI security clearance.

Responsibilities

• Lead complex SIEM engineering tasks with minimal supervision and provide technical guidance to the team.
• Administer, operate, and sustain the Elastic SIEM platform (Elasticsearch, Kibana, Logstash, Beats/Elastic Agent) across NIPRNet, SIPRNet, and JWICS environments.
• Monitor SIEM health, perform capacity planning, and resolve complex platform outages and degradations in accordance with defined SLAs.
• Develop, tune, and maintain detection rules, alerts, dashboards, and visualizations in Elastic to support DCO mission requirements.
• Ingest, normalize, and validate log data from diverse sources including endpoint, network, cloud, and application telemetry.
• Collaborate with cyber operators and analysts to support threat detection, alert triage, and cyber incident investigation workflows.
• Identify opportunities to improve SIEM coverage, data quality, and detection fidelity; lead implementation of improvements in coordination with the Government PMO.
• Support Cyber Security Service Provider (CSSP) activities including continuous monitoring and security event analysis.
• Create and maintain technical documentation including runbooks, standard operating procedures (SOPs), and knowledge base articles.
• Provide technical guidance and mentoring to journeyman engineers and review SIEM configurations and detection rules.
• Participate in Agile/SAFe Program Increment (PI) planning and sprint execution in support of platform delivery.
• Adhere to Air Force cybersecurity standards and all applicable DoD, IC, and USAF policy and directives across all enclaves.

Requirements

• Active Top Secret / SCI (TS/SCI) security clearance.
• Bachelor's degree in Cybersecurity, Computer Science, Information Technology, or related field (or equivalent experience).
• 7+ years of hands-on cybersecurity engineering experience.
• Advanced proficiency level: demonstrated experience leading complex Elastic SIEM integrations and troubleshooting, reviewing technical work, and mentoring engineers.
• Demonstrated hands-on experience with Elastic Stack (Elasticsearch, Kibana, Logstash, Beats/Elastic Agent) in an operational SIEM environment.
• Experience supporting threat detection, alert triage, and/or cyber incident investigation.
• Familiarity with DCO concepts, CSSP operations, and defensive cyber frameworks.
• Experience working across multiple network security domains (NIPR, SIPR, or JWICS).
• Meet applicable DoD 8140 requirements for the assigned work role.
• DCWF 521, Cyber Defense Infrastructure Support Specialist, Advanced Proficiency; specific required certifications pending contract confirmation.

Skills

• Experience with SIEM/SOAR integrations (e.g., Elastic, Palo Alto Cortex XSOAR, or similar).
• Familiarity with Elastic's Fleet/Agent management and integration development.
• Experience with AWS GovCloud environments (IL4/IL5/IL6).
• Knowledge of MITRE ATT&CK framework and its application to detection engineering.
• Experience with scripting/automation (Python, Bash, KQL/EQL) for SIEM rule development and data pipeline management.
• Familiarity with container-based deployments (Kubernetes/EKS) in classified environments.
• Prior experience supporting USAF or DoD DCO programs.
• One or more of the following certifications preferred: Elastic Certified Engineer, CompTIA CySA+, GCIA, or GCIH.

Benefits

• Health insurance coverage.
• Life and disability insurance.
• Retirement savings plan.
• Paid holidays and paid time off.
• Short- and long-term incentives.
• Program-specific awards.

Pay

Minimum salary: $145,000.00

Maximum salary: $180,000.00