Security Engineer (Splunk)

Coalfire is on a mission to make the world a safer place by solving our clients’ hardest cybersecurity challenges. The Security Engineer (Splunk) will maintain and support SIEM solutions in cloud environments, manage log collection infrastructure, and develop detection rules to identify security events.

Responsibilities:

• Maintain SIEM solutions (Splunk, Sentinel, ELK, LogRhythm, Sumo Logic) in cloud environments (AWS, Azure, GCP) to support FedRAMP continuous monitoring requirements
• Maintain and support SIEM platforms (Splunk, Sentinel, ELK, LogRhythm, Sumo Logic) in AWS, Azure, and GCP environments to support continuous monitoring and compliance requirements
• Manage and maintain log collection infrastructure including forwarders, collectors, and ingestion pipelines across hybrid environments
• Support SIEM performance tuning, storage management, retention settings, and licensing optimization under established operational guidelines
• Implement and maintain log retention and audit configurations aligned with FedRAMP and other compliance framework requirements
• Develop, tune, and maintain detection rules, correlation searches, and alerting logic to identify security events
• Create and maintain custom parsers and field extractions for complex or proprietary log sources
• Reduce false positives through ongoing rule tuning, baseline analysis, and detection improvement efforts
• Participate in peer reviews of detection rules and SIEM configuration changes
• Monitor SIEM alerts and investigate security events to support incident response and threat hunting activities
• Contribute to development and maintenance of detection and response playbooks and operational procedures
• Support troubleshooting of SIEM ingestion, parsing, and performance issues
• Work with infrastructure and application teams to onboard new log sources and improve security visibility
• Collect and organize SIEM control evidence and artifacts for audits and 3PAO assessment activities
• Ensure SIEM configurations support required controls such as audit review, log integrity, and time synchronization
• Create and maintain SIEM architecture, detection, and operational documentation and runbooks
• Provide technical support during client reviews and operational meetings as assigned
• Share knowledge and provide guidance to junior team members
• Contribute to process improvement and automation initiatives within SIEM and detection workflows

Requirements:

• 3+ years of hands-on systems engineering and architecture experience—including requirements definition, architecture development, use-case/story creation, and systems integration/testing
• 3+ years of cloud experience in architecture, design, implementation, operations, and automation (AWS, Azure, or GCP)
• Proven expertise with SIEM platforms (e.g., Splunk, Sentinel, ELK, LogRhythm, Sumo Logic) and enterprise antivirus (AV) solutions (e.g., Trend Micro, CrowdStrike, Microsoft Defender)
• Understanding of AWS, Azure, or GCP platform capabilities (ideally as a Cloud Architect, Cloud DevOps Engineer, or Cloud Security Engineer)
• Experience working in Agile environments with technical teams of three or more individuals
• Excellent communication, organizational, and problem-solving skills, with the ability to convey complex technical information clearly
• Strong documentation skills for creating technical diagrams, written descriptions, and other supporting materials
• Demonstrated ability to work both independently and as a member of a team, maintaining a professional attitude and demeanor
• Critical thinking skills to balance robust security requirements against mission objectives
• Proven track record of adapting quickly and efficiently in fast-paced, dynamic environments
• Proven track record delivering end-to-end SIEM solutions in large-scale or high-compliance environments—from initial design through operational handover
• Hands-on leadership or senior-level contribution in cloud security projects, collaborating across cross-functional teams (e.g., DevOps, architecture, compliance) to drive impactful security outcomes
• Documented success integrating multiple security tools (SIEM, AV, intrusion detection systems, etc.) into a cohesive, enterprise-wide monitoring solution
• History of working under strict regulatory or industry frameworks (e.g., FedRAMP, HIPAA, PCI), ensuring solutions meet required standards without sacrificing performance
• Demonstrable client-facing experience in a consulting or services capacity, maintaining professionalism and clear communication in high-stakes or fast-paced engagements
• Splunk Enterprise Certified Admin or SumoLogic Administration or Microsoft Security Operations Analyst Associate
• AWS Solutions Architect Professional or AWS DevOps Engineer Professional or Azure Solutions Architect Expert or GCP Cloud Architect
• Bachelor's degree or equivalent work experience
• US citizenship (required due to client contractual requirements)
• Professional services background: Prior experience supporting external clients from within a consulting or professional services organization
• Automation capabilities: Experience automating workflows in GitLab or GitHub with Terraform and Ansible
• Modern application architectures: Proven expertise with serverless, microservices, and related technologies
• Configuration baseline standards: Familiarity with CIS Benchmarks, DISA STIG, and other relevant guidelines
• Encryption technologies: Hands-on experience implementing SSL, PKI, and other encryption methods
• Compliance frameworks: Understanding of FedRAMP, FISMA, HIPAA, HITRUST, PCI, and similar regulatory standards
• Splunk Enterprise Certified Architect or Splunk Certified Automation Developer