Secure our Nation, Ignite your Future Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first. At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement. Currently, ManTech is seeking a motivated, career and customer-oriented Network Engineer III to join our team in Stafford, VA. Responsibilities may include, but are not limited to: The Network Engineer III plans, designs, and maintains connectivity of enterprise network assets to ensure compliance and secure operations on Classified networks (SIPR, NIPR, JWICS), collaborating with stakeholders to address connectivity requirements and implement necessary configurations to facilitate efficient and secure data transmission. They ensure all network switches and routers are operational, properly configured, and compliant with DISA STIG requirements and perform regular maintenance, updates, and troubleshooting of network switches to ensure optimal performance. They configure, maintain, and monitor firewall, intrusion protection, intrusion detection systems, and Cisco Identity Services Engine (ISE) for network access control and authentication in accordance with ATO requirements, cybersecurity policies, and standards. They implement the necessary security measures to protect specialized systems and networks from unauthorized access and cyber threats and support the planning and implementation of enterprise service connections between networks, systems, and applications across domains. They facilitate connections for auditing, authentication, secure cloud computing architecture (SCCA), and Cross Domain Solutions and Guards, ensuring compliance with relevant regulations and standards; collaborate with ISSOs and the ISSM in the Risk Management Framework (RMF) process; and provide inputs and documentation using designated templates and tools (e.g., Microsoft Office, InfoPath, Visio, etc.) to support the security assessment and authorization of TAC systems. They are familiar with ServiceNow or similar ticketing systems as well as the ITIL framework and service delivery concepts. The Network Engineer III is a senior role with extensive experience managing Classified enterprise networks. The Network Engineer III supervises, and mentors subordinate project and Team ManTech staff. Required Qualifications: Bachelor’s degree in an IT- related discipline and at least five (5) years of position specific relevant experience Must be a United States Citizen DoD 8570.01-m IAT Level-II Certification required Security Clearance Requirement: Top Secret Clearance required Physical Requirement: Must be able to be in a stationary position for more than 50% of the time. Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer. For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone. 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. If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information. Why ManTech? This is why! When you apply for a job at ManTech, you are taking the first step toward a new adventure. Trailblazing technology, incredible professional development and the opportunity to serve our nation. All while Securing the Future®. ManTech provides mission-focused technology solutions and services for U.S. defense, intelligence and federal civilian agencies. In business for more than 52 years, we excel in full-spectrum cyber, data collection & analytics, enterprise IT, and systems and software engineering solutions that support national and homeland security. More than 9,300 talented professionals around the globe make up the ManTech family and nearly half are veterans. As a ManTech employee, you will work for a winning team alongside colleagues that support and inspire you. You will also have access to tuition assistance, partnerships with universities and institutions, professional groups that comprise our Communities of Practice, community service opportunities, Technical Recognition Awards, Career Enablement/Mobility programs and so much more. What are you waiting for? Click “Apply” and start your adventure today.