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CACI International Cybersecurity Operations Specialist (SIEM) in St. Louis, Missouri

Cybersecurity Operations Specialist (SIEM)

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

CACI's Transport & Cybersecurity (TCS) program is seeking a motivated, career- and customer-oriented Cybersecurity Operations Specialist to perform on our Cybersecurity Data Analysis Services team in St. Louis, MO.

TCS offers a long-term contract opportunity supporting the National Geospatial-Intelligence Agency’s (NGA). Our team of talented Network and Cybersecurity professionals help design, develop, procure, implement, operate/sustain, and enhance NGA networks and cybersecurity posture in support of national security. Joining the TCS Team means working with cutting-edge technologies, on high performing cyber engineering teams, and benefiting from accelerated professional growth!

What You’ll Get to Do

As the Cybersecurity Operations Specialist, you will provide cybersecurity data analysis services, which designs, develops, builds, tests, configures, employs, operates, integrates, sustains, and refreshes the Security Information Events Management (SIEM) capability (i.e. Enterprise Audit), long-term analytics platform, log aggregation platform, and the cyber threat intelligence capability, signature development and deployment, and reputation management services. This includes the onboarding of all new and existing IT resources, and ensuring the correct routing of all audit events to mission partners in accordance with Intelligence Community Standards (ICS) 500-27.

More About the Role

  • Provide all preventative and corrective maintenance to ensure consistent, reliable, and secure service availability. This includes all actions required to return the service to full operational capability such as vendor RMA processes, removal and proper disposal of broken equipment/software, installation and testing of new equipment/software, and configuration of new equipment/software

  • Maintain system availability and reliability with a threshold of 99.99%

  • Detect and ticket degradations (volume/velocity) of all SIEM data flows within 60 minutes of the start of the degradation

  • Perform day-to-day maintenance, and specific scheduled maintenance activities that result from manufacturers recommended service intervals, alerts, bulletins, available patches, and updates according to agency approved change management processes. This includes maintaining updated documentation, change logs, and service bulletin libraries for all supported equipment and software in the CSOC knowledge management platform

  • Execute emergency maintenance actions with sufficient urgency to preclude unacceptable outage durations, approved by the Government prior to execution, and coordinated through and approved by CSOC and ESC government management

  • Perform all development, engineering, testing, integration, and implementation actions necessary for major vendor revisions

  • Perform continuous engineering assessments to improve the performance, effectiveness, coverage, and maturity of this service.

  • Retain documentation regarding loss of event logs (e.g. June 5-7th DNS logs were not ingested from SBU and are lost)

  • Configure all assets assigned to this service within the Government Furnished Information - Software Tools list in accordance with all Federal, DoD, IC, and NGA laws, directives, orders, polices, guidance, procedures etc.

  • Perform all development, design, engineering, testing, integration, and implementation actions needed for the total integration and interoperability between all applicable assets in the Government Furnished Information - Software Tools list. This includes ensuing all data flows are properly parsed for ingestion/transmission to internal and external automated reporting systems (e.g. JFHQ DoDIN – Joint Incident Management System, DoD CIO – DoD Scorecard/Get to Green reporting, IC CIO – Cybersecurity Performance Evaluation Model reporting, etc.)

  • Utilize agency approved ticketing systems to document, track, assign, update, and coordinate all engineering, integration, configuration, and maintenance actions

  • Use various monitoring, analysis, and visualization tools to track effectiveness, status, performance metrics, and other information as needed or required by Government staff and contractors assigned Cybersecurity Operations Services and Cybersecurity Readiness Services

You’ll Bring These Qualifications:


  • TS/SCI Clearance (current)

  • Ability to successfully pass/maintain Government Polygraph (post-hire)

Education / Experience

  • BA/BS Degree and Five (5) years of related work experience. Additional experience may be considered in lieu of degree.


  • DoD 8140.01 and DoD 8570.01-M IAT Level III compliant certification (current)

  • CSSP Analyst certification must be obtained within 120 days of hire date.

Skills / Technologies:

  • SIEM experience with one of the following: ArcSight , ElasticSearch , Splunk , E vent Broker , User Behavioral Analysis (UBA)

  • Providing support to Cybersecurity Operations Cell (CSOC) in creating alerting rules

  • Creating SIEM playbooks

  • Linux (RHEL) expertise (administration and engineering)

  • Manipulating SIEM filters to better find and analyze potential malicious/atypical activity and reduce false positives

  • Content development within ArcSight and Kibana to facilitate Cyber Analysts ability to investigate malicious events

  • Creation of ArcSight rules based on use cases of malicious events

  • Tuning and aggregation of queries and filters

  • Troubleshooting event flow through Enterprise Audit infrastructure

  • Troubleshooting event format and parsing for ingest into data storage and into SIEM tools

These Qualifications Would Be Nice to Have

  • Kibana

  • Data Analytics

What We Can Offer You:

  • We’ve been named a Best Place to Work by the Washington Post.

  • Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives.

  • We offer competitive benefits and learning and development opportunities.

  • We are mission-oriented and ever vigilant in aligning our solutions with the nation’s highest priorities.

  • For over 55 years, the principles of CACI’s unique, character-based culture have been the driving force behind our success.


Company Overview: At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. CACI is an Equal Opportunity Employer – Females/Minorities/Protected Veterans/Individuals with Disabilities.

As a federal contractor, CACI is subject to any federal vaccine mandates or other customer vaccination requirements. All new hires are required to report their vaccination status.