Information System Security Engineer (ISSE)

ManTech International Corporation - Chantilly, VA4.0

Full-timeEstimated: $110,000 - $140,000 a year
Secure our Nation, Ignite your Future


The successful candidate will support overall network defense activities, provide in-depth analysis of suspected malicious code and/or infected systems and network devices, perform necessary inspection and reverse-engineering activities to understand the behavior of software, determine the root cause for the presence of threats, and develop recommendations to counter threats.

Duties, Tasks & Responsibilities

Conducting proof of concept testing
Designing, testing, and integrating new security products as directed
Beta testing new capabilities when directed, and conducting software testing as required (patches and other updates)
Maintaining a robust library of documentation, to include network diagrams for cyber defense capabilities and sensors, and making documentation available to all personnel with appropriate need-to-know
Providing engineering support for all primary systems, such as network-based intrusion detection and prevention systems
Maintaining, updating, and conducting routine vulnerability scanning across all Sponsor networks
Overseeing patching, hardening, and base-lining activities across all Sponsor networks, and ensuring all stakeholders are in compliance with patching/hardening requirements
Maintaining, updating, configuring, and ensuring the successful deployment of logging/auditing tools across Sponsor networks
Maintaining system baselines and configuration management items, including security event monitoring policies
Working with all stakeholders to ensure complete and functioning systems that meet all requirements
Ensuring all network defense capabilities are kept current, patched, and securely configured, and the management is informed of status
Analyzing data flows into, out of, and across Sponsor networks to identify and rectify any security gaps
Performing limited penetration testing into targeted networks as directed

Required Experience, Skills, & Technologies

Experience working across a large team to drive a security agenda
Experience working with complex, intertwined systems and data flows
Significant, demonstrated experience meeting security requirements in the Sponsor's environment or similar environments (prior ISSE experience)
Experience inventorying complex networks, and with all facets of network documentation (security compliance, configuration management, patching, centralized authentication, removable media, etc.)
Hands-on experience with a wide range of diverse technologies/disciplines, especially with a security focus (networking, UNIX/Linux, Windows, Storage, Virtualization, etc.)

Expert-level abilities in the following areas:
Maintaining, configuring, and monitoring network security applications, network devices, encryption technologies, operating systems, and storage appliances
Securing information technology infrastructures
Monitoring network defense technologies and analyzing the outputs
Identifying and/or innovating solutions or measures to protect networks within budgetary and/or infrastructure constraints
Creating, maintaining, and communicating complex information technology documentation, particularly network and security documentation
Executing penetration tests, formal assessments, and other formal information security and compliance inspections
Significant, hands-on experience with security/monitoring tools such as Splunk, Solarwinds, WhatsUp Gold, or similar tools.
Self-starter with excellent people skills - able to work across teams, organize meetings/boards, and drive change throughout an organization
TS/SCI with Polygraph

Desired Experience, Skills & Technologies

CCNA strongly desired
CISSP strongly desired
Experience with the Xacta 360 cyber risk and compliance automation tool
Experience navigating the Sponsor's accreditation process and ICD 503 requirements

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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