Infoblox Network Engineer - TS/SCI with Polygraph

INFOBLOX NETWORK ENGINEER

YOUR IMPACT

Own your opportunity to support national defense. Your work will help keep critical operations secure and connected across the global enterprise directly, contributing to a mission that protects our nation every day.

CIS is growing, and we invite both our experienced incumbents and new team members to be part of what’s next. Incumbents bring invaluable mission insight, while new talent adds fresh ideas and energy. Together, we’ll strengthen continuity and drive the next generation of innovation.

MEANINGFUL WORK AND PERSONAL IMPACT

As an Infoblox Network Engineer supporting CIS, you will ensure the reliability, security, and high availability of enterprise DNS, DHCP, and IPAM services across multiple networks and environments. You will design and optimize core network services, maintain secure configuration baselines, and deliver resilient address management capabilities that enable mission critical applications to function seamlessly. Your work directly enhances network readiness, strengthens cybersecurity posture, and ensures dependable access to essential IT services.

KEY RESPONSIBILITIES:

• Administer, configure, and maintain Infoblox DDI platforms, including Grid architecture, DNS, DHCP, IPAM, and associated automation or security features
• Monitor availability, performance, and synchronization of Infoblox appliances, proactively identifying opportunities to improve resilience and operational efficiency
• Implement secure configuration baselines, system hardening, and STIG aligned controls across all Infoblox appliances and supporting network services
• Execute timely patching, firmware updates, and security fixes for Infoblox Grid members and virtual appliances using approved automation and compliance tools
• Review weekly vulnerability scan results, identify noncompliant systems, investigate root causes, and coordinate remediation to sustain enterprise security alignment
• Track and apply approved security directives, task orders, and vulnerability notices affecting DNS, DHCP, IPAM, and related network service components
• Design and maintain DNS zones, DHCP scopes, failover configurations, DHCP fingerprinting, reserved address plans, and IPAM automation workflows
• Provide Tier 3 troubleshooting for complex DDI issues, including DNS resolution failures, DHCP allocation problems, Grid synchronization errors, and service degradation
• Collaborate with networking, cybersecurity, engineering, and operations teams to support new system integrations, validate secure designs, and meet accreditation requirements
• Maintain accurate documentation of configurations, patch schedules, address plans, and operational procedures to support audit readiness and change control

WHAT YOU’LL NEED TO SUCCEED:

• EDUCATION: Bachelor’s degree in an IT-related field, 12+ years of relevant IT experience in lieu of a degree
• CERTIFICATION: Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)
• ADDITIONAL CERTIFICATION REQUIRED: Vendor-Specific (e.g., F5 Certified Administrator, BIG-IP certification)
• CLEARANCE: Active TS/SCI clearance with a favorable polygraph
• Hands-on experience administering Infoblox DDI platforms, Grid Manager, and core DNS/DHCP/IPAM services in an enterprise environment
• Strong understanding of TCP/IP networking, subnetting, DNSSEC, DHCP design, IP address planning, and secure network services architecture
• Experience performing patch management, system hardening, vulnerability remediation, and compliance reporting across network service platforms
• Strong analytical skills with the ability to diagnose complex network service issues and communicate clearly across technical teams

• US citizenship required

• LOCATION: Onsite

GDIT IS YOUR PLACE
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
Growth: AI-powered career tool that identifies career steps and learning opportunities
Support: An internal mobility team focused on helping you achieve your career goals
Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY
Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#CIS