Cyber Threat Engineer
Merrifield, VA
Experience: 0
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 382721
Date Posted: 11/02/2026
Shortcut: http://jobs.systemone.com/0BQmLX
Job Title: Cyber Threat Engineer
Location: Vienna, VA
Type: Contract
Work Model: Hybrid
Rate: 70-80/hr W2
Responsibilities
- Develop and maintain tools, scripts, and automated workflows that enable TIER threat-hunting and intelligence operations.
- Build repeatable processes for collecting, ingesting, enriching, transforming, and operationalizing threat intelligence data.
- Develop, test, document, and maintain YARA rules and supporting detection processes.
- Create Python-based utilities and script automation that reduce manual effort and improve workflow scalability.
- Translate analyst requirements into technical solutions, integrations, automated processes, and reusable capabilities.
- Apply the MITRE ATT&CK framework when developing threat-hunting tools, detections, and supporting processes.
- Integrate internal and external threat intelligence sources into TIER workflows and supporting tools.
- Validate and perform quality assurance for tools, scripts, rules, integrations, and automation before operational use.
- Troubleshoot and maintain TIER tools, data pipelines, integrations, and automated workflows.
- Maintain technical documentation and procedures needed to sustain developed capabilities.
- Bachelor's degree in cybersecurity, computer science, information technology, information systems, engineering, or a related technical discipline preferred; relevant experience may be considered in lieu of a degree.
- Master's degree in cybersecurity, information assurance, computer science, or a comparable technical discipline strongly preferred; comparable advanced technical qualifications or demonstrated expertise may be considered.
- Demonstrated experience in cybersecurity engineering, security automation, or threat engineering.
- Direct experience supporting Cyber Threat Intelligence or threat-hunting function required.
- Demonstrated experience with Python (3+ years), script-based automation, and YARA and SIGMA rule development.
- Practical experience applying the MITRE ATT&CK framework to cybersecurity or threat-hunting use cases.
- Security+, CySA+, GCIH, GCIA, or comparable cybersecurity certifications preferred, but not required.
- Strong cybersecurity engineering, automation, troubleshooting, and technical problem-solving skills.
- Ability to translate analyst requirements into reliable, reusable, and maintainable technical solutions.
- Ability to independently develop, test, document, and maintain scripts, integrations, automation, and supporting processes.
- Understanding of threat intelligence and threat-hunting concepts and workflows.
- Effective communication and collaboration with threat analysts and defensive cybersecurity partners.
- Strong attention to quality, repeatability, maintainability, and documentation.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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⚠️ Protecting Job Seekers from Identity Scams
At System One, your privacy and security are important to us. As job-related scams continue to target job seekers, we want to help you recognize and avoid common recruitment fraud. Identity theft scams often involve individuals, also known as "scammers," posing as recruiters or employers to obtain sensitive personal information, such as Social Security numbers, bank account details, or copies of driver’s licenses, with the goal of stealing identities, accessing financial accounts, or creating fraudulent accounts in a victim’s name.