Lead Network and Infrastructure Engineer

Lead Network and Infrastructure Engineer

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins nowunleash your potential with MANTECH! This is for a future opportunity.

MANTECH seeks a motivated, career and customer-oriented Lead Network and Infrastructure Engineer to join our team in Herndon, VA.

The Lead Network and Infrastructure Engineer will design, implement, and maintain secure and scalable network infrastructure supporting federal clients. You will lead network architecture efforts, oversee implementation, and ensure compliance with government security standards across complex environments, as well as lead the strategic oversight of designing, implementing, and managing compute, storage, and networking as part of the greater project scope and infrastructure. This position plays a critical role in enabling high availability in support of the national security mission.

Responsibilities include but are not limited to:

• Design, deploy, and manage secure, scalable network and related infrastructure (compute, storage, etc.) solutions across enterprise and mission-critical environments.
• Perform network capacity planning, performance tuning, and optimization.
• Ensure network architecture and infrastructure complies with federal security standards for the respective national security customer (e.g., DISA STIGs, FISMA, FedRAMP, NIST 800-53).
• Develop and maintain documentation including network and infrastructure diagrams, SOPs, and contingency plans.
• Collaborate with cybersecurity, systems engineering, and cloud teams to align on end-to-end architecture, and to support implementation, maintenance and incident response.
• Manage vendor relationships, evaluate tools, and implement new technologies as appropriate.
• Support ATO/accreditation efforts and participate in security audits and assessments.
• Provide escalation support and technical leadership during network incidents and outages.
• Interact with other area Leads to understand dependencies and technical resources to craft a repeatable architecture solution.

Minimum Qualifications:

• Bachelor's degree in Computer Science, Engineering or related field OR additional equivalent work experience
• 8+ years of experience in network engineering; 3+ years in a technical leadership role
• Strong experience with Cisco, Juniper, or Palo Alto technologies
• Expert level architecture creation and support experience; strong troubleshooting and documentation skills
• Proficiency in routing/switching, VPNs, firewalls, and load balancing in enterprise and secure environments
• Experience supporting federal networks and knowledge of RMF, DISA STIGs, or NIST 800-53
• Familiarity with Cloud network integrations (AWS, Azure, Oracle Cloud, etc.)
• Experience with Terraform scripting or AWS/Cloud Formation
• Prior experience supporting the Intelligence Community

Preferred Qualifications:

• Certifications: CCNP, CISSP, CEH, JNCIP, or similar
• Experience with SD-WAN, Zero Trust architecture, or hybrid-Cloud networking
• Knowledge of federal compliance frameworks (FedRAMP, FISMA, CMMC)

Clearance Requirements:

• Must have active TS/SCI with Polygraph

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Needs 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 presentations. Must be able to exchange accurate information in these situations.

MANTECH International Corporation considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation. If you need a reasonable accommodation to apply for a position with MANTECH, please email us at and provide your name and contact information.