Senior Network Engineer

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI Polygraph Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Cisco IOS, Internet Protocol Security (IPsec), Linux, Network Monitoring Tools, Routing and Switching Certifications: None Experience: 8 years of related experience US Citizenship Required: Yes Job Description: Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the mission to keep our country safe and secure. Key Skills for Success: Experience with Cisco IOS, Cisco Routers and Switches, Internet Protocol Security (IPsec), Switching Protocols, Virtual Private Networks (VPNs) Principal Duties / Responsibilities: Design, plan, build, and maintain secure communications networks supporting enterprise and hybrid environments. Configure routers, switches, firewalls, and IPSec-based VPN solutions for LAN, WAN, and remote-access connectivity. Coordinate LAN/WAN hardware/software improvements and/or enhancements. Ensure network reliability, scalability, and compliance while leveraging automation and emerging technologies to enhance operational efficiency and support mission-critical business operations. Provide current network diagrams and other documentation. Display a comprehensive understanding of routing and switching protocols (OSPF, BGP, EIGRP, VLAN, Spanning Tree, Multicast). In-depth understanding of Cisco IOS platforms and practical knowledge of networking topologies (LAN, WAN) and hands-on experience with IPSec VPNs. Experience with network diagnostic, monitoring, and analysis tools (e.g., SolarWinds, Splunk). Design, implement, and maintain complex LAN/WAN infrastructures, including routing, switching, and secure VPN connectivity. Ensure network integrity, compliance with security policies, and proper backup and recovery processes. Install, configure, manage, and troubleshoot F5 BIG-IP systems to ensure applications are fast, available, and secure. Analyze, diagnose, and resolve complex performance and connectivity issues. Proven experience with Cisco Secure Firewalls (FTD/FMC), ISE, and 802.1x authentication, including device access troubleshooting on network switches. Evaluate and integrate new communications technologies to enhance network performance, security, and scalability. Create network diagrams using Microsoft Visio. Document network design and create Standard Operating Procedures for the installation and configuration of network devices. Maintain current knowledge of evolving network and automation technologies. Collaborate effectively with cross-functional teams and provide mentorship when needed. Linux system administration (RedHat Enterprise) preferred. Configure and administer Cisco routers, switches, secure firewalls, and ISE for identity-based access control and 802.1x authentication. Required Qualifications: Must possess and maintain a TS/SCI clearance with lifestyle polygraph. Education: BA/BS degree or equivalent work experience. Experience: 8 years of related experience. Certifications: DoD 8570.01, Cisco CCNP (active) required. Additional Certifications: Cisco CCNP Enterprise, CCNP Security, DevNet, F5 certification. US citizenship. Desiree Qualification. Knowledge of Cisco Catalyst and Cisco Nexus series switches. Knowledge of F5 BIG-IP. Knowledge of Cisco ISR Gen2 (1900, 2900, 3900 series) and ISR Gen3 (4000 series) routers. Knowledge of Cisco Firepower series firewalls. Knowledge (including installation) of NSA Cryptographic devices (KG-175, KG-250). Knowledge of configuration of Cisco IOS 15.x, Cisco IOS-XE 16.x, and NX-OS 9.x. Location: On Customer Site Citizenship: US Citizenship Required 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 ● Flexibility: Full-flex work week to own your priorities at work and at home ***remove if ineligible*** ● 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. The likely salary range for this position is $136,000 - $184,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: Less than 10% Telecommuting Options: Onsite Work Location: USA CA Livermore Additional Work Locations: Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 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. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc. Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Join our 30,000 everyday heroes. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. 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Salary : $136,000 - $184,000