Senior Detection Engineer

BCMC • Arlington, VA

6d • Onsite

About The Position

BCMC is seeking a Senior Detection Engineer to support a U.S. Government customer providing onsite incident response to civilian Government agencies and critical asset owners affected by cyber-attacks. The role develops, validates, deploys, and tunes detection logic for proactive threat hunting across federal and critical infrastructure environments. It combines threat hunting, adversary behavior analysis, and detection engineering to identify sophisticated threats, close visibility gaps, and improve detection effectiveness.

The engineer translates threat intelligence, hunt findings, and incident response lessons into behavioral analytics, investigative queries, and automation. Working across endpoint, network, identity, cloud, and application telemetry, the engineer selects detection methods according to available evidence and mission requirements. The position bridges threat hunters, technical delivery teams, system engineers, analytics developers, and data scientists, turning operational findings into validated detections, automation, sensing improvements, and actionable capability requirements.

The role also provides technical leadership for vulnerability management and threat hunting activities, supports analyst development, and helps establish standards and competencies for detection engineering.

Requirements

• U.S. citizenship.
• Active TS/SCI clearance.
• Ability to obtain DHS Suitability.
• 10 or more years of directly relevant experience.
• Senior-level experience in threat hunting, detection engineering, incident response, or closely related defensive cyber operations, including independent ownership of production detection content.
• Strong command of hypothesis development, adversary behavior analysis, iterative investigation, and evidence-based conclusions.
• Demonstrated ability to develop, test, deploy, and tune production detections, explain limitations, and assess the effects of exclusions and suppression.
• Advanced proficiency in one or more security query languages, such as KQL, SPL, EQL, ES|QL, or vendor-specific EDR languages, and ability to adapt and optimize logic across platforms.
• Experience analyzing process execution, command lines, process ancestry, authentication, persistence mechanisms, network connections, and related enterprise telemetry.
• Understanding of Windows and Linux internals, enterprise networking, identity systems, cloud telemetry, and sophisticated adversary tradecraft.
• Practical experience mapping detections to MITRE ATT&CK and explaining the telemetry, test evidence, and limitations behind coverage claims.
• Proficiency in Python and PowerShell, or comparable languages, for analysis, enrichment, testing, and automation.
• Ability to clearly document detection intent, logic, validation results, investigation steps, and tuning decisions.
• Experience translating operational findings into engineering requirements and acceptance criteria, validating sensing effectiveness, and coordinating improvements across hunt analysts and delivery teams.
• Bachelor's degree in Engineering, Computer Science, Cybersecurity, Information Systems, or a related field.

Nice To Haves

• Master's degree preferred.
• Experience with CrowdStrike Falcon, Microsoft Defender, Cortex XDR, SentinelOne, Elastic, Splunk, or comparable platforms.
• Experience with portable detection content such as Sigma.
• Experience with detection-as-code and automated testing.
• SIEM data onboarding and pipeline tuning experience.
• Experience with adversary emulation and cyber exercise development.
• Federal civilian or critical infrastructure cyber operations experience.
• Experience maintaining detection engineering competencies, Job Qualification Requirements, training scenarios, and practical assessments.
• Desired certifications include GIAC Certified Detection Analyst (GCDA), GIAC Certified Forensic Analyst (GCFA), GIAC Defending Advanced Threats (GDAT), GIAC Certified Intrusion Analyst (GCIA), GIAC Certified Incident Handler (GCIH), GIAC Cyber Threat Intelligence (GCTI), Microsoft Certified: Security Operations Analyst Associate (SC-200), or Certified Information Systems Security Professional (CISSP).

Responsibilities

• Develop and test hypotheses to uncover persistence, privilege escalation, credential access, lateral movement, command and control, and defense evasion; correlate evidence across data sources and document defensible conclusions.
• Build behavioral analytics, correlation rules, signatures, and queries using endpoint, network, identity, cloud, and application telemetry, focusing on adversary techniques and activity sequences.
• Convert validated hunt methods, incident findings, and exercise results into reusable detections, documenting purpose, data requirements, investigative guidance, assumptions, and limitations.
• Translate capability gaps into technical requirements and acceptance criteria, recommend priorities through Threat Hunting governance, and verify delivered capabilities meet operational needs.
• Test detections against malicious and benign activity using historical telemetry, controlled simulations, and purple team exercises; evaluate intended behavior and evasion opportunities and retain test evidence.
• Analyze false positives, false negatives, alert volume, thresholds, exclusions, and environmental baselines; improve detection fidelity and context while assessing suppression risks.
• Assess sensor, tool, and data-source availability, reliability, and quality; identify collection, parsing, normalization, and retention gaps, coordinate remediation, and validate restored coverage.
• Develop and maintain automation for enrichment, query execution, analytical workflows, and detection validation, including SOAR playbooks where applicable; tune pipelines and queries and establish review, error-handling, and recovery procedures.
• Maintain version-controlled content, peer reviews, release criteria, approval records, and rollback procedures; revalidate analytics after platform, schema, environmental, or adversary tradecraft changes.
• Coordinate with hunters, incident responders, intelligence analysts, and platform engineers to integrate detections into investigative and automated workflows.
• Measure validated detection coverage, fidelity, actionable findings, and remaining gaps; communicate the operational significance of technical findings.
• Partner with analytics developers and data scientists to develop and validate advanced analytics, including machine learning where appropriate, and assess operational value, false positives, data dependencies, and limitations.
• Provide technical leadership supporting the section focal point for vulnerability management and threat hunting activities under applicable authorities.
• Develop exercise scenarios and expected detection outcomes, assess sensing failures, and track corrective actions.
• Evaluate tools, data sources, and analytical methods against mission gaps; document test results, operational limitations, and adoption recommendations.
• Review analytical work, mentor analysts, and set standards for query development, documentation, testing, deployment, and tuning.
• Develop and maintain detection engineering competencies, Job Qualification Requirements (JQRs), training scenarios, and practical assessments in coordination with section leadership.

Benefits

• Extremely competitive salary.
• 95% employer-paid employee medical, dental, and vision coverage.
• 100% employer-paid employee life, short-term disability, and long-term disability coverage.
• 401(k) with company match.
• Flexible Spending Account (FSA) for dependent and health care.
• 11 standard holidays and 3 weeks of annual leave.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior