Network Engineer

Job Description

ECS is seeking a Network Engineer to work in our Arlington, VA office.

About Us

ECS Federal, LLC is a trusted provider or mission-critical IT services for the U.S. government and defense sector. We pride ourselves in delivering secure, reliable, and innovative solutions to support national security objectives.

Position Summary

ECS Federal, LLC. is seeking a mid-level Network Engineer to support Mission-Critical operations in a secure classified environment. The ideal candidate will be responsible for the configuration, maintenance, monitoring, and security of enterprise network infrastructure, ensuring compliance with DoD cybersecurity policies, STIGs, and relevant federal standards.

Key Responsibilities

• Install, configure, and maintain network hardware and software, including switches, routers, firewalls, intrusion prevention systems, and identity service engines.
• Monitor network performance and troubleshoot connectivity, latency, and security issues.
• Implement and maintain security measures in accordance with DoD Risk Management Framework (RMF) and DISA STIG requirements.
• Support classified and unclassified networks in compliance with applicable security policies.
• Manage VLANs, IP address assignments, and DNS/DHCP services.
• Maintain documentation of network diagrams, configurations, and change management records.
• Coordinate with cybersecurity teams to apply patches, updates, and vulnerability mitigations.
• Provide Tier II/III support for network related incidents and escalations.
• Participate in network design and capacity planning to meet mission requirements

Additional Requirements

• Must be able to work in a secure facility and comply with strict physical and cyber access controls
• Ability to lift and rack networking equipment

Required Skills

• U.S. Citizen with DoD SECRET clearance with the ability to obtain a Top-Secret clearance
• Bachelor's degree in information technology or a related field of study
• Ability to monitor, problem solve, troubleshoot, and resolve issues
• IAT Level II certification (Security+ CE, CCNA Security, or equivalent) in accordance with DoD 8570.01-M
• 3-5 years of experience administering and securing enterprise network infrastructure.
• Strong knowledge of TCP/IP, routing protocols (BGP, OSPF, EIGRP), and Layer 2/3 networking.
• Experience with Cisco (Firepower, Catalyst) or similar networking equipment.
• Proficiency with firewall and network security tools like Cisco Threat Defense and Identity Service Engine. Familiarity with DoD networks and security requirements (RMF, STIGs, ACAS, HBSS).
• Cisco ISE and C2C implementation and maintenance

Desired Skills

• Cisco Certified Network Professional (CCNA) or Cisco Certified Network Professional (CCNP).
• Experience supporting virtualized network environments (Nutanix virtual networking).
• Knowledge of scripting and automation tools (Python, PowerShell).
• Experience with network management, scripting, and security protocols.
• Linux+

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ECS is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law.

ECS is a leading mid-sized provider of technology services to the United States Federal Government. We are focused on people, values and purpose. Every day, our 3500+ employees focus on providing their technical talent to support the Federal Agencies and Departments of the US Government to serve, protect and defend the American People.