SIEM Modernization Security Engineer

TIAG; Chevy Chase (MD); Hybrid; USD 130,000 - 170,000; Full time

Job summary

TIAG is seeking a SIEM Modernization Security Engineer to support a USU enclave modernization, reporting to the Bethesda, MD location in a Hybrid capacity. You will help transition 150 on-premise and cloud servers from a legacy Splunk Enterprise environment to a modern cloud-native SIEM, validate telemetry, and develop technical artifacts.

The role involves auditing current systems, evaluating platforms (Splunk Cloud, Microsoft Sentinel, Google Chronicle), implementing security baselines, RMF

Qualifications

• 3–7 years of hands-on cybersecurity engineering focusing on SIEM engineering, log routing, telemetry validation, and vulnerability management.

Responsibilities

• Assist in auditing the current SIEM environment to evaluate onboarded log sources, telemetry coverage, ingestion methods, and parser configurations.
• Compare different SIEM platforms to identify the best solution and ensure proper data protection and handling.
• Develop and implement security baselines in the selected platform to meet DoD requirements and Zero Trust principles.
• Provide Tier 2 support to resolve ingestion failures, parser issues, and connectivity problems during the transition.
• Create SOPs for Tier 1 admins covering onboarding, telemetry validation, and health monitoring.
• Support training delivery on the SIEM platform capabilities and query languages.

Skills

SIEM engineering

Log routing

Telemetry validation

Vulnerability management

Job description

TIAG is now hiring a SIEM Modernization Security Engineer to support a modernization and transition initiative for a Uniformed Services University (USU) enclave. This position reports to our Bethesda, MD location in a Hybrid capacity.The Security Engineer will work support the direction of the Lead SIEM Architect & provide ground-level engineering, technical enablement, and Tier 2 support to successfully transition approximately 150 on-premise and cloud-hosted servers from a legacy Splunk Enterprise environment to a modern, Government-selected cloud-native SIEM platform. The Engineer will actively enable this transition, validate telemetry, develop technical artifacts, and assist hands-on with implementation tasks where needed to ensure the project stays on track.Primary ResponsibilitiesAssist the Lead SIEM Architect in auditing the current USU Splunk Enterprise environment to evaluate onboarded log sources, telemetry coverage, ingestion methods, and parser configurations.Compare Splunk Cloud, Microsoft Sentinel, and Google Chronicle to identify the best SIEM solution for USU’s networks, ensuring it properly protects and handles their data.Implement Security Configuration Baselines on the chosen platform to ensure compliance with DoD cybersecurity requirements, DISA STIG guidance, RMF controls, and Zero Trust principles.Ensure system vulnerabilities across the SIEM platform and associated infrastructure are proactively identified, tracked, and patched in a timely manner to maintain a secure operating environment.Assist in navigating the Risk Management Framework (RMF) process, ensuring that the selected SIEM solution and integrated systems align with required RMF controls and USU security policies.Assist with the development, management, and resolution of Plan of Action and Milestones (POA&Ms) for any identified security deficiencies or configuration gaps discovered during the transition.Develop, test, and package validated Reference Implementations for all supported OS categories using templates, scripts, Group Policy Objects (GPOs), and agent profiles.Work alongside GFL administrators to actively assist in the hands-on onboarding of 150+ enterprise assets into the selected cloud-native SIEM environment.Provide daily Tier 2 technical troubleshooting to resolve ingestion failures, parser inconsistencies, configuration errors, and transport connectivity issues encountered during transition.Perform structured telemetry validation by testing at least one representative server for each supported operating system flavor to “prove the pipe”.Confirm end-to-end event generation, transport, ingestion, parsing, normalization, and visibility within the selected SIEM platform.Maintain a structured Tier 2 support process, including centralized ticket tracking, root cause analysis, and issue prioritization.Author clear, practical, step-by-step Standard Operating Procedures (SOPs) tailored for Tier 1 GFL SIEM administrators covering log onboarding, telemetry validation, and health monitoring.Document standardized alert tuning processes, threshold configurations, and event categorization guidelines to improve the SOC’s signal-to-noise ratio.Support the Lead Architect in delivering targeted \"delta\" training on the selected SIEM platform's specific capabilities, such as query languages (KQL or UDM), telemetry management, and search optimization.Facilitate hands-on operational demonstrations, guided troubleshooting sessions, and practical exercises for GFL administrators to reinforce learning and validate operational readiness.Required Qualifications3–7 years of hands-on experience in cybersecurity engineering, specifically focusing on SIEM engineering, log routing, telemetry validation, and vulnerability management. Operational experience configuring and maintaining enterprise SIEM platforms such as Splunk Enterprise, Splunk Cloud, Microsoft Sentinel, or Google Chronicle.Proven ability to troubleshoot log transport connectivity, parser failures, agent misconfigurations, and data normalization issues across diverse OS environments.Hands-on experience developing and deploying configuration artifacts, including deployment scripts, GPOs, and hardened agent configurations.Working knowledge of Federal and DoD compliance frameworks, including DISA STIGs, Risk Management Framework (RMF), and Zero Trust logging requirements. Demonstrated experience assisting with POA&Ms and patching workflows.Strong technical writing skills to author operational SOPs, combined with the ability to provide over-the-shoulder mentoring and practical training to Tier 1 operational personnel.IAT/IAM Level III CertificationSecret ClearanceTIAG is an equal opportunity employer and federal contractor or subcontractor. Consequently, the parties agree that, as applicable, they will abide by the requirements of 41 CFR 60-1.4(a), 41 CFR 60-300.5(a), and 41 CFR 60-741.5(a) and employment decisions shall be based solely on merit and without regard disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations. TIAG takes proactive steps to employ and advance in employment qualified individuals without regard to disability or protected veteran status. The parties also agree that, as applicable, they will abide by the requirements and may be subject and required to take action pursuant to the following laws and accompanying regulations:The Vietnam Era Veterans Readjustment Assistance Act of 1974, as amended (and its implementing regulations at 41 C.F.R. 60-300);Section 503 of the Rehabilitation Act of 1973, as amended (and its implementing regulations at 41 C.F.R 60-741); andExecutive Order 13496 (and its implementing regulations at 29 C.F.R. part 471, Appendix A to Subpart A).