{"schemaVersion":"jobsearcher.job.v1","id":"b2ffc161e014cc78bb2fcb5b","url":"https://jobsearcher.com/jobs/b2ffc161e014cc78bb2fcb5b","canonicalUrl":"https://jobsearcher.com/jobs/b2ffc161e014cc78bb2fcb5b","title":"Senior Systems Engineer","description":"MANTECH seeks a motivated, career, and customer-oriented Senior Systems Engineer to join our team in Chantilly, VA.You will help troubleshoot and fix a cyber security testing environment while developing its replacement. By leveraging your strong technical background, you will support the improvement and sustainment of mission-driven IT solutions that enable secure enterprise operations. This role provides the opportunity to cross train in additional IT areas (e.g., networking, cyber security, etc.).Responsibilities include but are not limited to:Troubleshooting and fixing a 1.0 cyber security testing environment, while developing a 2.0 cyber security testing environmentImproving performance and increasing security of 1.0 and 2.0 environmentsWorking with other groups on the same program to troubleshoot issues, apply fixes, improve performance, and increase environment securityWorking with other system engineers, system administrators, and security engineers to develop and maintain robust diagrams for cyber defense capability test environmentsEvaluating and recommending technology upgrades to support performance improvements and alignment with industry best practicesMonitoring and analyzing performance and faults while proposing solutions for system optimization and collaborating with stakeholders to coordinate technical informationHelping security engineers resolve issues and document solutions in SNOWMinimum Qualifications:Bachelor’s degree or 4+ years of additional work experience in lieu of a degree3+ years of experience in IT, system engineering, and/or system administrationIAT Level II certification or higher (Security+, etc.) or the ability to obtain certification within 6 months of hireExperience creating, maintaining, and communicating complex IT documentationExperience developing, administering, and troubleshooting systems that handle government data while ensuring they meet all cyber security requirementsExperience with technologies supporting large-scale enterprise deployments or data centers and inventorying complex systems and networksPreferred Qualifications:Experience implementing and supporting complex, multi-component software solutions across a large environmentExperience deploying enterprise security software including firewalls, intrusion prevention systems (IPS), and virtualization platformsKnowledge of Windows and Linux systems, WSUS and PDQ, ServiceNow (SNOW), Tenable/Trellix, EXSI servers, TCP/IP networking, 802.1x, and core network security principlesClearance Requirements:An active TS/SCI with polygraph is required for this positionPhysical Requirements:Must be able to remain in a stationary position 50% of the timeNeeds to occasionally move about inside the office to access file cabinets, office machinery, etc.Frequently communicates with co-workers, management, and customers, which may involve delivering presentationsMust be able to exchange accurate information in these situations","company":"ManTech","rawCompany":"mantech","city":"Chantilly","state":"VA","isRemote":false,"isActive":true,"createdAt":"2026-06-23T22:20:15.486Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"},{"code":"15-1211.00","title":"Computer Systems Analysts","slug":"computer-systems-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"},{"code":"541513","title":"Computer Facilities Management Services","slug":"computer-facilities-management-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Systems Engineer","description":"MANTECH seeks a motivated, career, and customer-oriented Senior Systems Engineer to join our team in Chantilly, VA.You will help troubleshoot and fix a cyber security testing environment while developing its replacement. By leveraging your strong technical background, you will support the improvement and sustainment of mission-driven IT solutions that enable secure enterprise operations. This role provides the opportunity to cross train in additional IT areas (e.g., networking, cyber security, etc.).Responsibilities include but are not limited to:Troubleshooting and fixing a 1.0 cyber security testing environment, while developing a 2.0 cyber security testing environmentImproving performance and increasing security of 1.0 and 2.0 environmentsWorking with other groups on the same program to troubleshoot issues, apply fixes, improve performance, and increase environment securityWorking with other system engineers, system administrators, and security engineers to develop and maintain robust diagrams for cyber defense capability test environmentsEvaluating and recommending technology upgrades to support performance improvements and alignment with industry best practicesMonitoring and analyzing performance and faults while proposing solutions for system optimization and collaborating with stakeholders to coordinate technical informationHelping security engineers resolve issues and document solutions in SNOWMinimum Qualifications:Bachelor’s degree or 4+ years of additional work experience in lieu of a degree3+ years of experience in IT, system engineering, and/or system administrationIAT Level II certification or higher (Security+, etc.) or the ability to obtain certification within 6 months of hireExperience creating, maintaining, and communicating complex IT documentationExperience developing, administering, and troubleshooting systems that handle government data while ensuring they meet all cyber security requirementsExperience with technologies supporting large-scale enterprise deployments or data centers and inventorying complex systems and networksPreferred Qualifications:Experience implementing and supporting complex, multi-component software solutions across a large environmentExperience deploying enterprise security software including firewalls, intrusion prevention systems (IPS), and virtualization platformsKnowledge of Windows and Linux systems, WSUS and PDQ, ServiceNow (SNOW), Tenable/Trellix, EXSI servers, TCP/IP networking, 802.1x, and core network security principlesClearance Requirements:An active TS/SCI with polygraph is required for this positionPhysical Requirements:Must be able to remain in a stationary position 50% of the timeNeeds to occasionally move about inside the office to access file cabinets, office machinery, etc.Frequently communicates with co-workers, management, and customers, which may involve delivering presentationsMust be able to exchange accurate information in these situations","datePosted":"2026-06-23T22:20:15.486Z","dateModified":"2026-06-23T22:20:15.486Z","hiringOrganization":{"@type":"Organization","name":"ManTech","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Chantilly","addressRegion":"VA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"b2ffc161e014cc78bb2fcb5b"},"url":"https://jobsearcher.com/jobs/b2ffc161e014cc78bb2fcb5b"}}