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Added 30 mins ago
AC
Staff / Principal Data Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $180,000 to $270,000 USD / year
…360 Fraud Protection. We are hiring a Staff or Principal Data Engineer to own the data platform and data lake at the heart of that work. You work hands-on and own the domain end-to-end,…
Added 30 mins ago
AC
Staff / Principal Platform Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $185,000 to $270,000 USD / year
You’ll own the platform spanning APIs, cloud and self-managed solutions and AI/ML infrastructure, and you’ll make it fast, reliable and observable at scale. This is a high-leverage,…
Added 30 mins ago
AC
Senior / Staff / Principal Platform Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $180,000 to $270,000 USD / year
We’re looking for a Senior, Staff or Principal Platform Engineer with deep expertise in Python, Linux systems and production platform engineering.
Added 30 mins ago
AC
Senior Sales Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $175,000 to $225,000 USD / year
The Senior Sales Engineer (SE) is the senior pre-sales subject matter expert for AppGate ZTNA and owns the technical engagement with commercial prospects from first meeting through…
Added 30 mins ago
AC
Senior Sales Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $175,000 to $225,000 USD / year
The Senior Sales Engineer (SE) is the senior pre-sales subject matter expert for AppGate ZTNA and owns the technical engagement with commercial prospects from first meeting through…
Added 30 mins ago
AC
Senior Sales Engineer
AppGate Cybersecurity, Inc.
Remote, United States
- $175,000 to $225,000 USD / year
The Senior Sales Engineer (SE) is the senior pre-sales subject matter expert for AppGate ZTNA and owns the technical engagement with commercial prospects from first meeting through…
Added 30 mins ago
AC
Senior/Staff/Principal AI/ML Engineer - Agentic AI Security
AppGate Cybersecurity, Inc.
Remote, United States
- $180,000 to $300,000 USD / year
We're looking for a AI/ML Engineer (Senior/Staff/Principal) - Agentic AI Security who will design, build, and operationalize the detection algorithms, ML inference pipelines, and risk…
Added 48 mins ago
Senior Software Engineer, Network Platform Security
Cisco Systems, Inc.
Milpitas, CA
Join the Infrastructure Engineering team as a Software Engineer and help redefine how networking problems are solved. You will develop innovative software for next-generation networking…
Added 49 mins ago
Principal Engineer Software Security Hybrid
Cisco Systems, Inc.
RTP, NC · San Jose, CA · Austin, TX · Chicago, IL
As a Principal Engineer on the AI Security team, you will be a senior technical authority shaping the security standard for every AI capability Cisco ships - to customers, partners, and…
Added 50 mins ago
Remote Lead Software Engineer for a Healthcare Company
Pearl
Remote, United States
…patients who cannot afford them. It is looking for a Founding Senior Full-Stack Engineer to build the products that increase the supply of donated…
Added 50 mins ago
Remote Lead Software Engineer for a Healthcare Company
Pearl
Remote, United States
…patients who cannot afford them. It is looking for a Founding Senior Full-Stack Engineer to build the products that increase the supply of donated…
Added 50 mins ago
Remote Lead Software Engineer for a Healthcare Company
Pearl
Remote, United States
…patients who cannot afford them. It is looking for a Founding Senior Full-Stack Engineer to build the products that increase the supply of donated…
Added 50 mins ago
Senior Juniper SRX Firewall Engineer
Symmetrio
Remote, United States
Symmetrio is recruiting a Senior Firewall Engineer to join the network security team of one of our large government customers. The Senior Firewall Engineer will support a primarily Juniper…
Added 51 mins ago
Solutions Architect
NuView
Remote, United States
4+ years of experience in a Solutions Architect, Systems Engineer, Senior Engineer, Technical Consultant, or similar role.
Added 51 mins ago
Senior Software Engineer
Murmuration
Remote, United States
As a Senior Software Engineer, you’ll be responsible for designing, building, and evolving the systems and services that power the Organizer platform. You’ll tackle complex technical…
Added 51 mins ago
Senior Optimization Engineer
Tierra
Remote, United States
…scientists, and market practitioners building the technology infrastructure for a new era of energy. Our ambition is to equip energy teams with the capabilities of a world-class trading…
Added 51 mins ago
Senior Optimization Engineer
Tierra
Remote, United States
…scientists, and market practitioners building the technology infrastructure for a new era of energy. Our ambition is to equip energy teams with the capabilities of a world-class trading…
Added 51 mins ago
Senior Optimization Engineer
Tierra
Remote, United States
…scientists, and market practitioners building the technology infrastructure for a new era of energy. Our ambition is to equip energy teams with the capabilities of a world-class trading…
Added 51 mins ago
Senior Optimization Engineer
Tierra
Remote, United States
…scientists, and market practitioners building the technology infrastructure for a new era of energy. Our ambition is to equip energy teams with the capabilities of a world-class trading…
Added 51 mins ago
Senior Storage Engineer
Runware
Remote, United States
As Senior Storage Engineer, you will own the storage architecture of Runware's AI supercomputer: how model weights, caches and customer data move from object storage on two continents to…
Added 51 mins ago
Senior Security Engineer
Runware
Remote, United States
As Senior Security Engineer, you will own the security of Runware's AI supercomputer: the bare-metal GPU fleet, the Sonic Inference Pods it lives in, the managed Kubernetes clusters we hand…
Added 51 mins ago
Sr. Solutions Architect/Sales Engineer-AI Infrastructure (GPU) -West Coast
Liqid
Remote, United States
…for Liqid’s most important customer opportunities. This is a senior individual contributor role for someone who can earn credibility with technical buyers, shape the solution architecture,…
Added 51 mins ago
Sr. Solutions Architect/Sales Engineer-AI Infrastructure (GPU) -West Coast
Liqid
Remote, United States
…for Liqid’s most important customer opportunities. This is a senior individual contributor role for someone who can earn credibility with technical buyers, shape the solution architecture,…
Added 51 mins ago
Expert RAG Engineer
Salvo Software
Remote, United States
We are looking for an Expert RAG Engineer to design, build, and own the retrieval-augmented generation systems behind our AI products. Your core work will be architecting production-grade…
Added 51 mins ago
Principal Engineer, Model Performance
Runware
Remote, United States
Runware is the AI inference platform that builds and runs its own infrastructure, end to end. Our Sonic Inference Engine has served more than 20 billion requests for over 1 million…

Solutions³ LLC

Senior Detection Engineer

Arlington, VA, United States

$131,000 to $150,000 USD / year

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Job details

Pay: $131,000 to $150,000 USD / year
Apply by: Jan 31, 2027
Experience: 10+ years of directly relevant experience
Posting language: English
Posted: Nov 2, 2026

Original job description

Title: Subject Matter Expert I

Description:

Solutions³ LLC is supporting a U.S. Government customer to support for onsite incident response to civilian Government agencies and critical asset owners who experience cyber-attacks, providing immediate investigation and resolution. Contract personnel perform investigations to characterize the severity of breaches, develop mitigation plans, and assist with the restoration of services.

Solutions³ LLC is seeking an experienced and technically proficient Senior Detection Engineer who develops, validates, deploys, and tunes detection logic supporting proactive threat hunting across federal and critical infrastructure environments. This role combines advanced threat hunting tradecraft, 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 reliable behavioral analytics, investigative queries, and automation. This work moves the team beyond individual hunts toward faster, repeatable, and scalable operations. Working across endpoint, network, identity, and cloud telemetry, the engineer selects detection methods based on available evidence and mission requirements. The position serves as the technical bridge between 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.

Salary Range: $131,000 - $150,000 Location: Arlington, VA Job Type: Onsite

Eligibility:

Must be a US Citizen
Must have an active TS/SCI clearance
Must be able to obtain DHS Suitability prior to starting employment
10+ years of directly relevant experience

Responsibilities Include:

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. Target adversary techniques and activity sequences rather than individual indicators of compromise.
Convert validated hunt methods, incident findings, and exercise results into reusable detections. Document each detection’s purpose, data requirements, investigative guidance, assumptions, and known limitations. Translate remaining gaps into technical requirements and acceptance criteria, recommend priorities through Threat Hunting governance, and verify that delivered capabilities meet the operational need.
Test detections against representative malicious and benign activity using historical telemetry, controlled simulations, and purple team exercises. Verify intended behavior, evaluate evasion opportunities, and retain test evidence.
Analyze false positives, false negatives, alert volume, thresholds, exclusions, and environmental baselines. Improve detection fidelity and alert context through enrichment and prioritization, while assessing the risk of suppressing legitimate threat activity.
Assess the availability, reliability, and quality of sensors, tools, and data sources. Identify collection, parsing, normalization, and retention gaps and explain their impact on active hunts and production detections. Coordinate remediation with infrastructure teams and validate restored coverage.
Develop and maintain automation for enrichment, query execution, analytical workflows, and detection validation, including SOAR playbooks where applicable. Tune data pipelines and queries for speed and responsiveness. Build in 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 and avoid equating rule counts with effective coverage.
Partner with analytics developers and data scientists to develop and validate advanced analytics, including machine learning where appropriate. Assess operational value, false positives, data dependencies, and analytical limitations.
Provide technical leadership supporting the section focal point for vulnerability management (VM) and threat hunting (TH) activities under applicable authorities. Develop exercises cenarios and expected detection outcomes, assess sensing failures, and track corrective actions.
Evaluate new tools, data sources, and analytical methods against identified 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.

Required Skills:

Demonstrated 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.
Proven ability to develop, test, deploy, and tune production detections, explain their limitations, and assess the effects of exclusions and suppression.
Advanced proficiency in one or more security query languages (KQL, SPL, EQL, ES|QL, or vendor-specific EDR languages), with the 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.

Desired Skills:

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 with maintaining detection engineering competencies, Job Qualification Requirements, training scenarios, and practical assessments

Desired Certifications:

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)
Certified Information Systems Security Professional (CISSP)

Required Education: Bachelor’s degree in Engineering, Computer Science, Cybersecurity, Information Systems, or related field (Master's Degree preferred)

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More about this job

Skills

Incident response
Prioritization
Machine learning
Leadership
Work analytically
Documentation
Query languages
Microsoft Windows
Linux
MITRE ATT&CK
Python
Microsoft PowerShell
Splunk
Test automation
Onboarding
CISSP
Computer science
Cybersecurity

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