Network Engineer

CACI International Inc.; Ashburn (VA); Hybrid; USD 87,000 - 182,000; Full time

Job summary

CACI International Inc. is seeking aSenior Network Engineer to join the BEAGLE Agile Solution Factory team supporting CBP in Northern Virginia.

The role focuses on secure DMZ architecture, F5 BIG-IP management, and high-availability networks for low-latency FMV streaming. Hybrid on-site schedule in Ashburn, VA is required, with up to 10% travel. You'll mentor junior engineers and contribute to agile sprint work.

Qualifications

• U.S. citizen with ability to pass CBP background investigation.
• 5–7+ years of enterprise network engineering experience.
• B.S. in Computer Science, Network Engineering, or related field (equivalent experience accepted).
• Hybrid schedule with on-site requirement in Ashburn, VA.

Responsibilities

• Design, secure, and maintain DMZ network architecture with high availability.
• Administer F5 BIG-IP solutions including LTM/GTM, APM, ASM/WA, AFM.
• Optimize video streaming with QoS and routing for FMV across the network.
• Support remote/disconnected field clients with secure VPN/SD-WAN paths.
• Collaborate in an Agile Scrum team translating requirements into network designs.
• Configure routing and switching, integrate with core CBP network and AD.
• Contribute to ISA, SDD and SMP documentation.
• Provide Tier IV escalation support for enterprise WAN.
• Mentor junior network team members.

Skills

NGFW

F5 BIG-IP

DMZ security

BGP

QoS video streaming

SD-WAN

VPN

Cisco routing

Cisco switches

Education

Bachelor's degree in Computer Science or related

Tools

Riverbed SteelCentral

NetScout

Gigamon

Cisco Prime

Wireshark

Job description

Job Title: Network EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: NoneEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * *The Opportunity:CACI is currently looking for a Senior Network Engineer with agile methodology experience to join our BEAGLE (Border Enforcement Applications for Government Leading-Edge Information Technology) Agile Solution Factory (ASF) Team supporting the Customs and Border Protection (CBP) client located in Northern Virginia!As a member of the BEAGLE ASF Team, you will support the men and women charged with safeguarding the American people and enhancing the Nation’s safety, security, and prosperity. CBP agents and officers are on the front lines, every day, protecting our national security by combining customs, immigration, border security, and agricultural protection into one coordinated and supportive activity.In this role, you will be a key technical driver in optimizing network performance for critical border security applications. Your expertise will be focused on securing and managing high-availability servers within the Demilitarized Zone (DMZ), optimizing the network infrastructure for low-latency Full-Motion Video (FMV) streaming, and ensuring resilient connectivity for remote and disconnected tactical field clients operating at the tactical edge.Responsibilities:· DMZ & Edge Architecture: Design, implement, secure, and maintain the network architecture for external-facing systems within the DMZ, ensuring robust security postures, proper zoning, and high availability using F5 Load Balancers and Next-Generation Firewalls (NGFW).· F5 BIG-IP Network & Application Services: Provide comprehensive end-to-end administration, engineering, and lifecycle management of F5 BIG-IP solutions, encompassing LTM with custom iRules scripting, APM, ASM/Advanced WAF, GTM, and AFM to ensure application availability, performance, security, and access control.· Video Streaming Optimization: Engineer, monitor, and fine-tune network paths, Quality of Service (QoS), and routing protocols (multicast/unicast) to support seamless, low-latency live Full-Motion Video (FMV) streaming to tactical operators.· Remote & Disconnected Client Support: Build and maintain secure, highly resilient network pathways (including VPNs, SD-WAN, and cellular/satellite backup) designed to support remote field users and disconnected edge clients who experience intermittent, low-bandwidth, or high-latency network conditions.· Agile Team Collaboration: Serve as a collaborative member of an Agile Scrum team, translating business requirements into technical network designs, hardware/software solutions, and automated network updates in short sprints.· Infrastructure Management: Design, configure, and troubleshoot routing and switching for test environments, including connections back to the core CBP network, Active Directory, and endpoint configuration managers.· Technical Documentation: Contribute to Basis of Estimate (BOE) and Bill of Materials (BOM) buildups, and support the creation/update of critical documentation including Interconnection Security Agreements (ISA), System Design Documents (SDD), and System Maintenance Plans (SMP).· Tier IV Support: Provide Tier IV escalation support for CBP’s Enterprise Wide Area Network (WAN) Infrastructure, troubleshooting complex routing across highly secure, multi-tenant MPLS networks.· Mentorship: Provide technical guidance, advice, and mentoring to junior and mid-level network team members.Qualifications:· Citizenship & Clearance: Must be a U.S. Citizen with the ability to pass a CBP background investigation. Criteria include, but are not limited to:o 3-year check for felony convictionso 1-year check for illegal drug useo 1-year check for misconduct such as theft or fraud· Professional Experience: 5–7+ years of related network engineering experience supporting complex, enterprise-level environments.· Education: College degree (B.S.) in Computer Science, Network Engineering, Information Management Systems, or a related discipline (equivalent experience accepted in lieu of degree).· Location: Must be available to work a hybrid schedule with an on-site requirement in Ashburn, VA.You are good at:· Secure Infrastructure Design: Hands-on experience configuring Cisco Next-Generation Firewalls (NGFWs), Cisco Firepower, F5 Load Balancers (LTM/GTM), and establishing secure DMZ zone transitions.· Video & Media Routing: Optimizing enterprise-wide networks for heavy-bandwidth streaming applications, including multicast routing (PIM, IGMP), traffic shaping, and complex QoS configurations.· Cisco Routing & Switching: Advanced configuration and troubleshooting of Cisco routers (ASRs, ISRs, Generation 2, and 1900-7600 series) and switches to a CCNP level.· Core Protocol Expertise: Expert-level knowledge of IP routing (IPv4/IPv6), BGP (required), EIGRP, OSPF, and Virtual Routing and Forwarding (VRF) in highly secure, multi-tenant network environments.· Edge Connectivity: Setting up secure remote access solutions, Site-to-Site VPNs, DMVPN, or SD-WAN technologies for remote and mobile teams.· Performance Monitoring & Diagnostics: Utilizing advanced network analysis tools such as Riverbed SteelCentral, NetScout, Gigamon, Cisco Prime, and Wireshark to isolate packet loss, high latency, and network bottlenecks.· Collaborative Mindset: Working with minimal supervision while communicating effectively with application developers, systems engineers, and non-technical customer stakeholders.Desired:· Prior experience working with Customs and Border Protection (CBP) networks and systems.· Industry certifications such as CCNP Enterprise , CCIE , or F5 Certified Technology Specialist .· Experience integrating on-premises networks with AWS/Cloud networking infrastructure (VPCs, Direct Connect, Transit Gateways).· Familiarity with tactical network equipment, cellular (LTE/5G) failover routing, or satellite communications (SATCOM) for edge field agents.· Experience operating within an Agile/Scrum software development environment (using Jira, Confluence, and ServiceNow).-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:$86,600 - $181,800CACI 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.