Senior Network Administrator TS/SCI with Polygraph

Job description

**Req ID:** RQ207118
**Type of Requisition:** Regular
**Clearance Level Must Be Able to Obtain:** Top Secret SCI + Polygraph
**Public Trust/Other Required:** None
**Job Family:** IT Infrastructure and Operations
**Skills:**
Network Infrastructures,Networking Hardware,Network Systems
**Experience:**
6 + years of related experience
**US Citizenship Required:**
Yes

**Job Description:**

Transform technology into opportunity a Network Computer Systems Administrator with GDIT.

A career in enterprise IT means connecting and enhancing the systems that matter most.

At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate.

At GDIT, people are our differentiator.

As a Network Computer Systems Administrator, you will help ensure today is safe and tomorrow is smarter.

 

HOW A PROJECT MANAGER WILL MAKE AN IMPACT: 

+ Install, configure, and maintain enterprise LAN/WAN infrastructure, including routers, switches, firewalls, and VPNs.

+ Independently design and build new network environments, including topology, configuration, and architecture planning.

+ Configure and troubleshoot dynamic routing protocols, including OSPF, RIP, and BGP.

+ Configure and apply standard ACLs to enforce security and traffic policies.

+ Configure, maintain, and troubleshoot Cisco/Juniper enterprise switching environments (Catalyst, Nexus, EX, QFX).

+ Design and implement VLANs, trunking (802.1Q), and inter-VLAN routing to support multi-tenant and segmented environments.

+ Manage Spanning Tree Protocol (STP, RSTP, MST) to ensure loop-free topology and rapid convergence.

+ Deploy EtherChannel/LACP for link redundancy and throughput optimization.

+ Administer, configure, and manage Cisco ASA appliances, including VPN solutions and secure remote access.

+ Implement and manage firewall platforms (Cisco ASA/Firepower, Palo Alto, Juniper SRX) with strong experience in rule creation, policy management, and security hardening.

+ Enforce DoD/DISA STIGs and security baselines across network infrastructure.

+ Monitor, optimize, and troubleshoot network performance to ensure high availability, reliability, and security.

+ Provide advanced troubleshooting and root cause analysis for complex connectivity issues.

+ Support network modeling, analysis, and capacity planning to align with modernization initiatives.

+ Collaborate with engineering teams on integration of emerging technologies and network upgrades.

+ Provide mentorship or guidance to user support and network support staff as required.

 WHAT YOU’LL NEED TO SUCCEED: 

+ Required Education and Experience: Technical Training, Certification(s) or Degree + 8 years 

+ Certifications: DoD Manual 8570.01-M at the Information Assurance Technical (lAT) Level II role & Cisco Certified Network Associate (CCNA) minimum requirement; Cisco Certified Network Professional (CCNP) preferred.

+ Security Clearance Level: TS/SCI clearance and ability to obtain and maintain a CI Polygraph 

+ Location: 100% On-Site required

+ Strong knowledge of OSPF, RIP, and BGP routing protocols (Layer 3)

+ Knowledge of standard ACLs for security and traffic filtering

+ Strong knowledge of Cisco routing and switching technologies

+ Configure, maintain, and troubleshoot enterprise Layer 2 switching (Catalyst, Nexus, EX, QFX)

+ VLAN design, trunking (802.1Q), inter-VLAN routing, and STP/RSTP/MST management

+ Experience with EtherChannel/LACP for redundancy and performance

+ Ability to configure and manage Cisco ASA appliances

+ Knowledge of VPN technologies, secure remote access, and remote administration

+ Knowledge of network architecture planning and design

+ Familiarity with DoD/DISA STIGs and security baseline enforcement

+ Ability to work independently and drive tasks to completion with minimalsupervision

 

  

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.

The likely salary range for this position is $125,528 - $169,832.

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.
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 https://gdit.com/tc.
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Required Skill Profession

Other General