The Opportunity

CACI is seeking a Network Engineer I to join a highly skilled engineering team supporting the Merlin program, maintaining and advancing secure communications infrastructure. This person will support mission‑critical environments by assisting with the operation, maintenance, and troubleshooting of enterprise network infrastructure. The ideal candidate will have a strong foundation in networking principles, hands‑on experience with Cisco networking technologies, and a desire to grow within a collaborative engineering environment.

Work alongside senior engineers to configure, optimize, and support network operations across classified and unclassified environments. Contribute to the continuous improvement of network capabilities through documentation, troubleshooting, and infrastructure modernization efforts. This position requires being in the office 100% and is located in Sterling, VA.

Responsibilities

Install, configure, and maintain network infrastructure components, including switches, routers, wireless access points, and firewalls.
Support network deployments, upgrades, infrastructure migrations, and site implementations.
Configure and troubleshoot Layer 2 and Layer 3 networking components, including VLANs, IP addressing, routing, DHCP, DNS, and NAT.
Configure and support Cisco Catalyst switching environments.
Perform packet captures and traffic analysis for network diagnostics and troubleshooting.
Monitor network health and assist with identifying performance and reliability issues.
Assist with firewall administration and troubleshooting under the guidance of senior engineers.
Maintain and document device configurations, network diagrams, and IP address inventories.
Provide technical input during meetings and contribute recommendations for network improvements.
Collaborate using Jira, Confluence, and other ticketing and documentation tools.
Support Linux and Windows networking environments, including interface configuration, routes, and connectivity troubleshooting.

Qualifications

Required:

Bachelor’s degree in Information Technology, Information Science, Computer Science, or related field.
0–3 years of experience supporting, maintaining, or troubleshooting network infrastructure in an academic, internship, lab, or professional environment.
Cisco CCNA certification preferred, or equivalent networking knowledge.
Understanding of TCP/IP, VLANs, subnetting, routing, switching, DHCP, DNS, and NAT.
Hands‑on experience with Cisco networking equipment through coursework, internships, labs, or professional experience.
Experience troubleshooting network connectivity and performance issues.
Familiarity with packet capture and analysis tools such as Wireshark.
Basic knowledge of Linux and Windows operating systems.
Strong understanding of Layer 1–3 networking concepts and troubleshooting methodologies.
Strong communication, collaboration, and customer service skills.

Desired:

Experience working in an MSP, NOC, enterprise IT, or similar operational environment.
Experience configuring Cisco Catalyst switches.
Exposure to AWS or Azure networking concepts.
Familiarity with Python, Power Shell, or other scripting languages used for automation.
Knowledge of enterprise infrastructure documentation and diagramming tools.
Progress toward advanced networking certifications such as CCNP Enterprise.
Experience supporting network infrastructure in a DoD or enterprise environment.

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…