Network Administrator (Senior)

CACI International Inc; Ashburn (VA); On-site; USD 104,000 - 218,000; Full time

Job summary

CACI International Inc. seeks a Senior Network Administrator for the GMOS contract supporting the Department of State. You will lead a technical team and manage NGFW deployments, firewall troubleshooting, and secure connectivity with federal agencies.

The role emphasizes network design, disaster recovery, and hybrid / data center operations. Responsibilities include coordinating bandwidth upgrades, implementing CA API Gateway, and supporting cloud/network infrastructure.

Qualifications

• Bachelor's degree plus 8+ years in network administration, engineering, or IT operations.
• Active Secret Clearance.
• Experience with next-gen firewalls (Palo Alto, F5 BIG-IP, API Gateway) and advanced network security.
• Strong knowledge of Layer 2/3 networking, fiber cabling, and disaster recovery configurations.

Responsibilities

• Implement and manage web application firewalls and NGFWs (Palo Alto, F5 BIG-IP ASM, CA API Gateway).
• Troubleshoot complex firewall issues and liaise with government DT teams and advisory board.
• Install, configure, and maintain internal wiring, fiber, and Layer 2/3 devices across enterprise infra.
• Coordinate with DT for bandwidth upgrades and AI-enabled network optimization.
• Support cloud/network infrastructure and participate in design reviews for facilities.

Skills

Next-gen firewalls

Layer 2/3 networking

Leadership

Disaster recovery planning

Bandwidth management

Education

Bachelor's degree

Tools

Palo Alto

F5 BIG-IP

API Gateway

Cisco Umbrella

Illumio

Job description

Job Title: Network Administrator (Senior)Job Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * *The Opportunity:CACI is seeking a Senior Network Administrator for the Global Mission Operations Support (GMOS) contract, supporting the Department of State. This role offers a unique opportunity to enhance national security through advanced IT solutions. You will collaborate with experienced professionals in an innovative environment, guiding a high-performing team to deliver excellence. The GMOS contract aims to provide world-class IT support by modernizing and maintaining applications and infrastructure using an integrated IT Service Management approach. Join us to make a meaningful impact on a program of national importance.Responsibilities:Implement and manage web application firewalls and Next-Generation Firewalls (NGFWs) including Palo Alto, F5 BIG-IP ASM, and CA API Gateway for comprehensive securityTroubleshoot complex firewall issues with DT teams, facilitate secure connectivity with Government agencies, and liaise with DT's Firewall Advisory BoardInstall, configure, troubleshoot, and maintain internal wiring, fiber optic cabling, and Layer 2/3 network devices across enterprise infrastructureInstall and configure load balancers and API Gateways appliances or virtual instances in data centers, cloud, or hybrid setupsTrack infrastructure component failures and initiate escalation actions to ensure timely support responses within established Service Level Agreement (SLA) thresholdsCoordinate with DT to plan and execute proactive bandwidth upgrades, utilizing emerging technologies such as AI for network optimization and predictive analysisReestablish network connectivity during office moves, relocations, and facility changes, and submit Technical Service Request (TSR) documentation for new jacks and cabling installationsProvide comprehensive support for CA's micro-segmentation platforms and policies.Provide comprehensive support for cloud and software-defined network infrastructure and policies.Participate in design reviews for new facilities or renovation plans, providing technical input on network architecture, cabling infrastructure, and capacity requirementsSupport disaster recovery network configurations ensuring rapid failover capabilities, redundancy, and minimal downtime during contingency operationsDevelop and enhance technical or functional workarounds and triage steps that aid Service Desk Technicians in rapidly resolving network issues and improving resolution timeAnalyze network equipment logs to identify trends, detect problems, and maximize network performance and efficiencyQualifications:Required:Bachelor's degree + 8 years of experience in related fields, such as network administration, network engineering, infrastructure administration, firewall management, or IT operations; equivalencies considered.Active Secret ClearanceProven experience with next-generation firewalls (Palo Alto, F5 BIG-IP, API Gateway) and advanced network security implementationsDemonstrated expertise in Layer 2/3 networking, fiber optic cabling, network infrastructure design, and disaster recovery configurationsStrong knowledge of bandwidth management, capacity planning, and coordination with government network providersExcellent leadership abilities with proven experience planning and leading technical network initiatives, functioning as a subject matter expert, and supervising network operations teamsDesired:Prior experience supporting federal agencies, especially the Department of StateExperience with Cisco Umbrella, Illumio, AWS, Azure, or Oracle Cloud networking.Professional certifications such as Cisco CCNP, Palo Alto Networks Certified Network Security Engineer (PCNSE), F5 Certified Administrator, or CompTIA Security+Knowledge of ITIL frameworks, change management processes, and experience supporting mission-critical network infrastructure in secure environments-What You Can Expect: A culture of integrity.At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.An environment of trust.CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.A focus on continuous growth.Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.Pay Range :There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.The proposed salary range for this position is:$103,800 - $218,100CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.