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Mantis Security is a leading specialty firm of high caliber talent who specialize in Cyber Operations, Cyber Defense, Information Assurance, Software Development, DevSecOps, Security Engineering, and Cloud Engineering. W…
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Full-time
professional certificate
Posted 9d ago
Apply by Dec 2
~40 hrs/week
Responsibilities
The SIEM Analyst will monitor and analyze security events while developing and tuning correlation rules and dashboards to improve detection accuracy. They will also support incident investigations, threat hunting, and the onboarding of new log sources to ensure visibility across the environment.
Requirements
Candidates must have 10+ years of cybersecurity experience with hands-on SIEM expertise and an active TS/SCI security clearance. Proficiency in enterprise SIEM platforms, security logging, and detection methodologies is required, along with a Security+ or equivalent certification.
Full job description
Mantis Security is a leading specialty firm of high caliber talent who specialize in Cyber Operations, Cyber Defense, Information Assurance, Software Development, DevSecOps, Security Engineering, and Cloud Engineering. We enable and protect our nation's most important IT assets and invest in the long-term career development of every employee! We are currently looking for the next SIEM Engineer to join our team of experts!
What You'll Be Doing
As a SIEM / Detection Engineer at Mantis Security, you'll help improve how we identify and respond to threats by ensuring our security data is collected, correlated, and turned into effective detections. You'll work closely with SOC analysts and engineers to continuously improve the team's visibility and detection capabilities.
Develop, tune, and maintain Splunk searches, alerts, correlation rules, and dashboards
Build and improve detection logic to identify suspicious and malicious activity while reducing false positives
Support the onboarding, parsing, normalization, and validation of security log sources
Identify gaps in logging, telemetry, and detection coverage and help implement improvements
Translate emerging threats and attacker techniques into actionable detections using frameworks such as MITRE ATT&CK
Support SOC investigations and threat hunting by developing queries and correlating activity across multiple data sources
Troubleshoot SIEM data ingestion, search, alerting, and performance issues
Document detection logic, configurations, processes, and recommended improvements
What We're Looking For
10+ years of cybersecurity experience, including hands-on experience with SIEM or security monitoring technologies
Strong Splunk experience, including SPL searches, correlation searches, dashboards, and alert development
Experience developing and tuning security detections in a SOC environment
Understanding of security logging across Windows, Linux, network, endpoint, identity, and cloud environments
Experience onboarding and troubleshooting security data sources within a SIEM
Strong understanding of common attack techniques and how to translate them into detection logic
Familiarity with MITRE ATT&CK, incident response, and threat hunting
Relevant cybersecurity or SIEM certification such as Security+, CySA+, GIAC, or Splunk certification
Nice to Have
Previous SOC Analyst or incident response experience
Experience supporting DoD, Intelligence Community, or other federal environments
Experience with AWS and cloud-based security telemetry
Experience with Python, PowerShell, or other scripting languages
Mantis Security provides purpose-built cybersecurity solutions that safeguard some of the nation's most sensitive information assets. Our security consultants work with data owners and system developers to provide modern security approaches in software systems architectures and security engineering while maintaining the traditional cornerstone of information assurance. Our solutions balance security and functionality objectives to ensure that your sensitive data remains well-protected while empowering users to focus on mission accomplishment.
Mantis Security provides expertise in Application Security Testing, Information Assurance, Security Engineering, Cloud Security, DevSecOps, Cyber Data Science, Security Architecture, Cyberspace Operations, and Critical Infrastructure Security.
http://www.mantissecurity.com
Offices: Sarasota, FL 34236, US · Reston, VA 20191, US · Washingon, DC 20340, US · College Park, MD 20740, US · Alexandria, VA 22314, US
How much do Security & Safety jobs in Reston, VA pay?
Based on 508 listings with disclosed salaries, most security & safety jobs in Reston, VA pay between $73k–$222k per year. Individual offers vary with seniority, company size, and specialization.
How many Security & Safety jobs are open in Reston, VA right now?
There are currently 655 open security & safety positions in Reston, VA listed on Clera. New openings are added daily as companies post roles.
Which companies are hiring for Security & Safety roles in Reston, VA?
Companies currently hiring include Leidos, CACI International Inc, Workday, mouhamedzz, SOSi, among others. Browse the listings above to see every active employer.
Are there remote or hybrid Security & Safety jobs in Reston, VA?
Yes — 201 of the 655 open security & safety positions offer remote or hybrid work (51 remote, 150 hybrid).
How do I apply for Security & Safety jobs in Reston, VA?
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.