> Markdown version of [/jobs/ext/3451220-senior-cyber-security-engineer](https://www.wearedevelopers.com/jobs/ext/3451220-senior-cyber-security-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Cyber Security Engineer - **Company:** Mantech International Corporation - **Location:** Chantilly, VA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Cyber Security, Intrusion Detection and Prevention, Network Security, Linux System Administration, Office Suite, Security Software, Software Requirements Analysis, Transmission Control Protocol (TCP), Tenable Nessus, 3-tier Architectures, Operating System Security, Servicenow, Vulnerability Analysis - **Published:** September 10, 2026 - **Apply:** https://dejobs.org/x/x/037A57C118EC48E39012F9B20FF5D8B7/job/ ## About the Role MANTECH seeks a motivated, career and customer-oriented Senior Cyber Security Engineer to join our team in the Chantilly, VA area., * Bachelor's degree or 4+ years of additional experience in lieu of a degree * 5+ years of experience working with cybersecurity tools. * Working knowledge of the Tenable Network Security product suite and enterprise vulnerability scanning operations. * Solid understanding of Windows and Linux systems administration, operating system security practices, TCP/IP networking, and network security concepts. * Demonstrated technical knowledge of cybersecurity enterprise scanning, continuous monitoring, enterprise host/network security, and intrusion detection. * Technical ability to convert functional cybersecurity requirements into system requirements and apply cybersecurity architectural principles (e.g., defense-in-depth, resilience). * Excellent organizational, planning, communication, and customer service skills with strong attention to detail. * Active IAT Level II certification, or the ability and willingness to obtain IAT Level II certification within 6 months of hire. Preferred Qualifications: * Knowledge of and proficiency in using Amazon Web Services (AWS) technologies and ServiceNow. * Understanding of federal cybersecurity guidance, including NIST SP 800-37 (Risk Management Framework) and NIST SP 800-137 (Information Security Continuous Monitoring). * Experience with automation and scripting technology capabilities to streamline repetitive workflow processes. * Ability to function effectively in a fast-paced environment, managing multiple priorities independently or as part of a collaborative team. Security Clearance Requirements: * Must possess an active TS/SCI security clearance with a polygraph. Physical Requirements: * Must be able to remain in a stationary position 50% of the time. * Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine, and computer printer. * The person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations. * Ability to work in a cubicle environment without distractions. ## Description * Perform engineering support and system administration of specialized cybersecurity applications and systems, including installation, configuration, maintenance, patching, and backup/restore. * Provide expertise in creating, editing, and managing scan policies, audit files, scan jobs, reports, dashboards, and custom content for tools such as Tenable Nessus and ServiceNow integration. * Deliver Tier 2 and Tier 3 maintenance support for deployed cybersecurity technologies and ensure compliance with customer policies, procedures, and TASKORDs. * Provide customer support via phone, email, or messaging services to troubleshoot vulnerability scanning issues, maintaining clear communication throughout the resolution process. * Provide ideas for and integrate automation of repetitive project tasks and metrics collection using scripts, assisting with testing and production implementation. * Support Assessment and Authorization (A&A) activities related to cybersecurity technologies, updating project documentation and resolving tool implementation conflicts. * Analyze customer feedback, policies, and workflows to provide recommendations for process improvements and increased project efficiency. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Applying Agile Principles to Incident Management ](https://www.wearedevelopers.com/videos/101-applying-agile-principles-to-incident-management) - [One Platform Could Not Fit Them All](https://www.wearedevelopers.com/videos/1919-one-platform-could-not-fit-them-all) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [AI in Production: applied AI & enterprise use cases](https://www.wearedevelopers.com/videos/100130-ai-in-production-applied-ai-enterprise-use-cases) ## Related Articles - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Dev Digest 191: Malware interviews, EU ❤️ Open Source and Skilled Agents](https://www.wearedevelopers.com/magazine/645-dev-digest-191-malware-interviews-eu-open-source-and-skilled-agents) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)