Infoblox Network Engineer - TS/SCI with Polygraph

General Dynamics Information Technology•Washington, DC

3d•Onsite

About The Position

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.

Requirements

Bachelor’s degree in an IT-related field, 12+ years of relevant IT experience in lieu of a degree
Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)
Vendor-Specific (e.g., F5 Certified Administrator, BIG-IP certification)
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

Nice To Haves

DHCP Servers
DNS
DNSSEC
Infoblox
IP Address Management (IPAM)

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

Benefits

Comprehensive benefits and wellness packages
401K with company match
Competitive pay
Paid time off
Variety of medical plan options
Health Savings Accounts
Dental plan options
Vision plan
401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match
Full flex work weeks where possible
Variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave
Short and long-term disability benefits
Life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance