Network Engineer - Cisco NextGen Firewalls (TS/SCI with Poly Required)

GCI Incorporated; Warrenton (VA); On-site; USD 140,000 - 180,000; Full time

Job summary

GCI Incorporated is seeking a Network Engineer to design, implement, and maintain complex enterprise networks. The role requires deep expertise in routing, switching, and security controls, with hands-on Cisco ACI experience across multi-data center environments.

The candidate will lead network architecture efforts, troubleshoot issues, and collaborate with cross-functional teams to meet mission requirements. TS/SCI with Polygraph clearance is required for the role.

Qualifications

• Bachelor’s degree or equivalent in a technical field; 10+ years of IP network design/architecture experience.
• Experience with architecting IP networks and related technologies across multi-data center environments.
• Hands-on experience with network monitoring, security controls, and cross-functional teamwork.

Responsibilities

• Design, implement, and maintain complex network infrastructures.
• Troubleshoot and resolve network issues; collaborate with other IT disciplines.
• Develop and maintain Cisco ACI design, planning, implementation, and testing across multiple data centers.
• Produce architectural design solutions and present to client stakeholders.
• Mentor other engineers and participate in 24x7 on-call rotations.

Skills

Routing & Switching

Troubleshooting

SDN expertise

Cisco ACI design

Team collaboration

Tech research & innovation

Network strategy

Technical design

Traffic analysis

Network configuration

Security boundary

VXLAN/EVPN

Education

Bachelor’s Degree in CS/related

Tools

Cisco ACI

Cisco DCNM

OTV

VMware NSX

Job description

GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.

Job Description

The Network Engineer will be responsible to design, implement, and maintain complex network infrastructures. This role requires deep technical expertise in networking technologies, including routing, switching, and network security controls. The ideal candidate is a technical practitioner, not just an advisor - someone who can design, implement, and troubleshoot complex network architectures and familiar with the customer’s enterprise networks to include Local Area Network (LAN) and Wide Area Network (WAN), and routing protocols. The ideal candidate must have the professional connection to the customer’s enterprise networks and familiar with the Cisco ACI technology.

Qualifications

• Bachelor’s Degree in Computer Science or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience
• Minimum ten (10) years of relevant experience (additional experience may be substituted for a degree) with architecting and designing IP networks and associated technologies

Required Knowledge/Skills

• In-depth understanding of networking to include routing, switching, network monitoring and management
• Strong troubleshooting skills specific to network connectivity, security, and ability to effectively work in cross functional teams as needed to resolve issues
• Expert for SDN engagements built around Cisco ACI
• Background in Cisco ACI design, planning, implementation, and testing, based on a multi data center configurations
• Good team and collaboration skills
• Ability to research and find new and innovative technologies to enhance the existing network
• Define network strategy with respect to technology domain standards and design goals
• Provide technical design and architectural leadership, including documenting and diagramming the logical, physical and process views
• Experience analyzing network traffic, using a variety of network tools to assess security-related events to assist in rapid identification and isolation of issues during incidents and outages
• Experience in designing, configuring, implementing, and troubleshooting these various network technologies and protocols
• Experience designing, deploying, and maintaining boundary security solutions and exposure to enterprise network architecture
• Good knowledge and hands-on experience with VXLAN/EVPN

Desired Knowledge/Skills

• Experience with Network Access Control and Segmentation
• Experience with security compliance standards
• Experience with site-to-site VPNs and/or remote access VPNs
• Network programmability for automating network tasks (Ansible, Puppet, Chef, Python, Rest API’s)
• Experience with Data Center and co-location solutions as they relate to SDN architecture and Design
• NextGen Firewall Experience
• Experience configuring/administrating various network technologies including Cisco ACI, Cisco DCNM, OTV, VMware NSX
• Demonstrated experience designing and implementing network reference architecture from mission requirements gathering to technology rollout oversight, including capacity management, technology selection, integration of multiple tools and technical documentation
• Familiarity with Software defined networking (SDN) Network Disaggregation technologies and methodologies along with open-source solutions
• Ability to brief complex information to senior leadership
• Familiarity with Software defined networking (SDN) Network Disaggregation technologies and methodologies along with open-source solutions
• Drive enhancements through full life cycle from concept to final implementation and support

Key Responsibilities

• Installation and maintenance of network equipment
• Troubleshooting and resolution of network issues
• Design network architectures based on customer requirements and industry best practices
• Development of unique solutions that will meet customer requirements and industry best practices
• Collaborate effectively with other IT disciplines (e.g., Storage, Platform, Application) to troubleshoot and resolve complex problems
• Develop and maintain configurations plans for Cisco ACI design, planning, implementation, and testing, based on a multi data center configurations
• Create architectural design solutions and successfully present them to client stakeholders
• Work with infrastructure engineers to identify new products and solutions
• Document maintenance for all computer systems and network infrastructure
• Maintain systems and documentation as needed for audits and compliance
• Communications with customers: keeping them informed of incident progress, notifying of impending changes, or coordinated outages
• Be available for other engineers and coach them to resolution
• Participate in 24x7 on call and assist in resolving issues outside normal business hours
• A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans