Security Engineer (SIEM) at Coalfire

About Coalfire Coalfire is on a mission to make the world a safer place by solving our clients’ hardest cybersecurity challenges. We work at the cutting edge of technology to advise, assess, automate, and ultimately help companies navigate the ever-changing cybersecurity landscape. We are headquartered in Chicago, Illinois with offices across the U.S. and U.K., and we support clients around the world. But that’s not who we are – that’s just what we do.   We are thought leaders, consultants, and cybersecurity experts, but above all else, we are a team of passionate problem-solvers who are hungry to learn, grow, and make a difference. Position Summary   We’re looking for a SIEM Engineer II to play a central role in implementing and maintaining robust security monitoring solutions—ensuring our clients stay protected against emerging cyber threats and remain compliant with industry standards. If you’re driven by a desire to innovate and thrive in a collaborative environment, come be part of a team committed to making the world a safer place. What You’ll Do • 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 What You’ll Bring • 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. Bonus Points • 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 Why You’ll Want to Join Us At Coalfire, you’ll find the support you need to thrive personally and professionally. In many cases, we provide a flexible work model that empowers you to choose when and where you’ll work most effectively – whether you’re at home or an office. Regardless of location, you’ll experience a company that prioritizes connection and wellbeing and be part of a team where people care about each other and our communities. You’ll have opportunities to join employee resource groups, participate in in-person and virtual events, and more. And you’ll enjoy competitive perks and benefits to support you and your family, like paid parental leave, flexible time off, certification and training reimbursement, digital mental health and wellbeing support membership, and comprehensive insurance options. At Coalfire, equal opportunity and pay equity is integral to the way we do business. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. Coalfire is committed to providing access, equal opportunity, and reasonable accommodation for individuals with disabilities in employment, its services, programs, and activities. To request reasonable accommodation to participate in the job application or interview process, contact our Human Resources team at [Upgrade to PRO to see contact].